Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e9de8cb4f33b4b…

MALICIOUS

PDF

94.9 KB Created: 2020-08-14 16:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b15c3252e2ab5e4b9811702dc049d627 SHA-1: fb078055862a26d9cd674966925a613cf80990cf SHA-256: 78e9de8cb4f33b4ba972073e1679eae9867e3f194dd9c5450857fd525c2822da
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains text suggesting it is related to subtitles, which is likely a lure. The presence of many external PDF links, some pointing to Shopify, suggests a link farm or a method to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=above+the+shadows+subtitles
    • http://fiwifi.vikingsfc.org/uploads/1/3/0/7/130775818/vidowonugafinutu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • http://www.indictrans.org
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0438/2559/4530/files/76346480355.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/92234201755.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2014/files/alveolitis_seca.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/45284124678.pdf
    • https://cdn.shopify.com/s/files/1/0430/6432/8345/files/hcv_capacitors_solutions_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/vidabasobekivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/mafalemigifariji.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/38573295437.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8518/files/58625681400.pdf
    • https://cdn.shopify.com/s/files/1/0434/6223/0181/files/employment_letter_samples.pdf
    • https://cdn.shopify.com/s/files/1/0429/4708/4447/files/90715434109.pdf
    • https://cdn.shopify.com/s/files/1/0437/7922/7810/files/22157663975.pdf
    • https://cdn.shopify.com/s/files/1/0435/7832/7203/files/elementary_stability_and_bifurcation_theory.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • https://gitlab.com/smc/meera/blob/master/COPYING
    • http://sinhala.sourceforge.net/
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITS
    • http://www.gnu.org/licenses/gpl-2.0.html
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 15

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_016_off000139e7.bin
2f0f80db9e8871d083fdcf24edaea7760edc574062ef06e3d78c75733e5b8771		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x139E7 18892 bytes
font_00_sfnt_off000061a7.bin
2e595141cfc5a730015d867094056734cd151f5b215480bba884d522f17c5808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A7 7916 bytes
font_01_sfnt_off00007607.bin
9440f71eefa4f59c7a71b16fb0b9f65724f2db68f71ee41650680a98f027c4b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7607 4032 bytes
font_02_sfnt_off00008478.bin
56f043169076640da226465a6a1a87d12c48ab0445ab9eca2b919dba984b4d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8478 5100 bytes
font_03_sfnt_off000095d4.bin
ff8289fcab20b7b81f5dc7c47458689637225d7099c48932a46d6898d6123f6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D4 2656 bytes
font_04_sfnt_off0000a0d9.bin
2a2f73c0ee504ae8509221dab9a50e72e6c400a18e3952d3eee660ba18a0c3b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0D9 4140 bytes
font_05_sfnt_off0000adf6.bin
b5c6b6e0c9ada0bf1c6b02372d38a6194b0fc304f51b15768a03b7bd417def48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADF6 3048 bytes
font_06_sfnt_off0000ba05.bin
18b250f24057ce91e4a59b25c1eec79fa8b4d7e2cb9f6c0de02c7e032a072fd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA05 2328 bytes
font_07_sfnt_off0000c4bc.bin
5fd53e2058c4f5d98b70161d670f1e42036942552fef68ac845a5e47e2d7f715		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BC 2604 bytes
font_08_sfnt_off0000cf9d.bin
5b8e8035f8940535bfb5f3d78de7d5c45dbc51c905faa5d9788b8fc152e96872		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9D 3840 bytes
font_09_sfnt_off0000ddac.bin
5fc9e2cd4e7ad04544edda2023dd698132b65daf167a61e09de9fd8de66d8b52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAC 2108 bytes
font_10_sfnt_off0000e787.bin
87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE787 4336 bytes
font_11_sfnt_off0000f527.bin
488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF527 6148 bytes
font_12_sfnt_off00010511.bin
39c5eea0474f97a1dc5acd3eb95f81b3df858fed92f15dd7c62c11c48ebaf006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10511 17056 bytes
font_14_sfnt_off00015949.bin
0a763f02db1d1c5d34f23894b7a4af96ea2433ab124f48894d552220baaa19fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15949 3536 bytes

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