Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5ab963793afa06…

MALICIOUS

PDF

44.4 KB Created: 2020-08-30 19:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa08e2187cef8ee74c476524aec94e8f SHA-1: 4132a70993553df2d0367d67813a86563ae2974c SHA-256: 7b5ab963793afa06c5450df0cf941c5cc40729e94e326635b055b4c0aac935c9
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=transcend+mp850+manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and appears to be a lure related to a product manual. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites.

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.ru/wix?keyword=transcend+mp850+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_034fe068f00c4feab4e6424493976977.pdf
    • https://static.usrfiles.com/ugd/b8c837_487fc394f08a44459ad4c0592f0a8814.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ac85aa85a6c4456be04a1ff789b1937.pdf
    • https://static.usrfiles.com/ugd/8de238_0b20ca6572a94647920281d170e5e12c.pdf
    • https://static.usrfiles.com/ugd/b8c837_51fe41c0722f429dbb50cc7821b345d2.pdf
    • https://static.usrfiles.com/ugd/e3325f_30b834b783724e29a7910e4323b450e8.pdf
    • https://static.usrfiles.com/ugd/8b9728_74ae9a753bfd4c8ebf0e50eede518d48.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba607913a8904a358d37d38dc01a3227.pdf
    • https://static.usrfiles.com/ugd/e32576_284620503dde49c7a5287a84aa19d437.pdf
    • https://static.usrfiles.com/ugd/271e65_e26c5fdf6bd745b383caf848f93d1290.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/17589485986.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/33057533097.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/ruvorisulik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/zixididetulakix.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_8e278e0617e3443d8a3d95e1ce4fa045.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_6d5e00d0d9f54a3587166d81bd854563.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064b6.bin
7b7776a246464c1ccf849de254b57bd115d851a4a20fbcffb0d75a125025d1ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B6 5628 bytes
font_01_sfnt_off00007780.bin
7dba557bf7430b25df70f985e16d9caac4af2fb783eebb3b0dd08941983bca4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7780 1412 bytes
font_02_sfnt_off00007f33.bin
9b3ec726fb78dc8f3bd80bf720d84dda77c448030607687be2a4fa49ecca832c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F33 10788 bytes

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