Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3e098609ded749…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 15:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beee6c0504533119a3d9de344572ea65 SHA-1: 775638d5f4bbcf393525ebf1a6302165e394cefe SHA-256: 0b3e098609ded7495018639dab25e3725ccc5f1308d2f09748bccba4b624657b
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=tales+of+berseria+blood+spraying+crystal', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other Shopify links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector points to a phishing or malware distribution attempt.

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=tales+of+berseria+blood+spraying+crystal
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/16452401409.pdf
    • https://cdn.shopify.com/s/files/1/0429/0212/6755/files/equifax_mailing_address_for_credit_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/5514/4347/files/kegipawalodexosizixo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3382/9271/files/namovakivokufiwib.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/70338436261.pdf
    • https://static.usrfiles.com/ugd/b8c837_735c6288f6dc435e9ebd8326560b260d.pdf
    • https://static.usrfiles.com/ugd/b8c837_951e570927e8432a904e5e6ccbc294f8.pdf
    • https://static.usrfiles.com/ugd/735189_ff500bc904a147a8a056091868a97b32.pdf
    • https://static.usrfiles.com/ugd/b8c837_abebc3777b5b4a4f8867a1f155e4821f.pdf
    • https://static.usrfiles.com/ugd/89064d_7ee01f2e60f9428a8e091ec43eac19f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c9f39ed0de14c4eb5c44c0f4445f9c1.pdf
    • https://static.usrfiles.com/ugd/daca0d_16573cf049e246b591ac2234cd2ab6c0.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d4b.bin
7eb2f9061113cc6e31c01720b469f97cea2da265019452d584dd8f4c4d8e2c92
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4B 5512 bytes
font_01_sfnt_off00007015.bin
92c7b4a016c05cd3231404530118b0d002a57852a3680b90361f8a36929afc6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7015 10244 bytes