Malicious PDF — malware analysis report

Static analysis result for SHA-256 7313091cade2006b…

MALICIOUS

PDF

66.6 KB Created: 2020-08-17 16:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ca02799cfdd1777b123f5eed67762a2 SHA-1: 7164158cf7403dbae2f8f40b82fb48f5f01e7a88 SHA-256: 7313091cade2006b6ce7635cf40721330150370a378e6a396157a693c251080d
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for phishing and malware distribution. The document body text, though partially obfuscated, includes a search query suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the redirector URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=bruno+mars+grenade+video++mp4
    • http://nulebixig.eugeneholisticmedicine.com/uploads/1/3/1/4/131438556/1f57170cbece.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/58504077136.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/fewegovejokegavazofaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4885/files/16876669259.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4309/files/58934766667.pdf
    • https://cdn.shopify.com/s/files/1/0429/3751/6191/files/maplestory_2_client.pdf
    • https://cdn.shopify.com/s/files/1/0434/1265/2194/files/fozede.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/rowoxomagivorijum.pdf
    • https://cdn.shopify.com/s/files/1/0450/6117/7507/files/jpg_to_online2.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/bba_syllabus_ipu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/microelectronic_sedra_smith.pdf
    • https://cdn.shopify.com/s/files/1/0433/4498/6280/files/verbal_ability_aptitude_test.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067fb.bin
104cb1cc1b3fb0f450e1822a1f29f1feaea41a56c64fa37ae3dfd2b517597308		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FB 21172 bytes
font_01_sfnt_off0000aaa4.bin
142bb8dbddb281bcd8f8df655e4e36e1ec7056cb1c457b8f0d77bd2d14f3f78b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA4 5444 bytes
font_02_sfnt_off0000bd17.bin
1309dea92864418b77af6e6b85517229926c6c9beba0a9b5e5452b90929ba3dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD17 13424 bytes
font_03_sfnt_off0000e75b.bin
73bb1f519e29941fc98367ae33a8b679223d41029fbf73fb5c585da9ec8c2502		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE75B 16204 bytes

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