Malicious PDF — malware analysis report

Static analysis result for SHA-256 d989cb736dbff8d2…

MALICIOUS

PDF

94.5 KB Created: 2020-09-06 12:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd764118e974f038c4d21ad13d7670e4 SHA-1: fec27f47e4b4d24ce125372e0e95c054f580fad5 SHA-256: d989cb736dbff8d26154478abc1040d849a2921d0e9b51162f8a52354381139c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous Shopify-hosted PDFs, with one primary malicious redirector URL. The document body, though obfuscated, contains the search term 'wonder woman 2017 subtitles' and the malicious URL, indicating a lure to trick users into clicking the link. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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.link/wix?keyword=wonder+woman+2017+subtitles
    • https://cdn.shopify.com/s/files/1/0437/6307/3181/files/73440581444.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/52825138881.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/619245787.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8213/files/lemasozinafapuloxivajized.pdf
    • https://cdn.shopify.com/s/files/1/0447/9080/8737/files/aircraft_landing_gear_hydraulic_system.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3041/files/consumer_report_best_tv_2019.pdf
    • https://cdn.shopify.com/s/files/1/0463/1815/7989/files/66783453295.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/56509791556.pdf
    • https://cdn.shopify.com/s/files/1/0464/7911/4408/files/markdown_cheat_sheet_table.pdf
    • https://cdn.shopify.com/s/files/1/0437/9590/6721/files/tajadolovubakemenosut.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/98087076759.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/penanesugebepuleter.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/

Extracted artifacts 15

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_016_off000138d7.bin
2f0f80db9e8871d083fdcf24edaea7760edc574062ef06e3d78c75733e5b8771		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x138D7 18892 bytes
font_00_sfnt_off00005c6d.bin
2e595141cfc5a730015d867094056734cd151f5b215480bba884d522f17c5808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6D 7916 bytes
font_01_sfnt_off000070cd.bin
9440f71eefa4f59c7a71b16fb0b9f65724f2db68f71ee41650680a98f027c4b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CD 4032 bytes
font_02_sfnt_off00007f3e.bin
f9810967f27e18a48e06b02f5028ab15670ec436aefe5ff5ebd4b0e342562511		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3E 5624 bytes
font_03_sfnt_off00009262.bin
ff8289fcab20b7b81f5dc7c47458689637225d7099c48932a46d6898d6123f6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9262 2656 bytes
font_04_sfnt_off00009d67.bin
2a2f73c0ee504ae8509221dab9a50e72e6c400a18e3952d3eee660ba18a0c3b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D67 4140 bytes
font_05_sfnt_off0000aa84.bin
b5c6b6e0c9ada0bf1c6b02372d38a6194b0fc304f51b15768a03b7bd417def48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA84 3048 bytes
font_06_sfnt_off0000b693.bin
18b250f24057ce91e4a59b25c1eec79fa8b4d7e2cb9f6c0de02c7e032a072fd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB693 2328 bytes
font_07_sfnt_off0000c14a.bin
5fd53e2058c4f5d98b70161d670f1e42036942552fef68ac845a5e47e2d7f715		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC14A 2604 bytes
font_08_sfnt_off0000cc2b.bin
5b8e8035f8940535bfb5f3d78de7d5c45dbc51c905faa5d9788b8fc152e96872		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2B 3840 bytes
font_09_sfnt_off0000da39.bin
5fc9e2cd4e7ad04544edda2023dd698132b65daf167a61e09de9fd8de66d8b52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA39 2108 bytes
font_10_sfnt_off0000e411.bin
87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE411 4336 bytes
font_11_sfnt_off0000f1b1.bin
488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B1 6148 bytes
font_12_sfnt_off0001019b.bin
1be4b71b266467aa7df2dc665614fa0e5e025f37eabf431dabeda9466b70381d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1019B 18056 bytes
font_14_sfnt_off00015839.bin
0a763f02db1d1c5d34f23894b7a4af96ea2433ab124f48894d552220baaa19fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15839 3536 bytes

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