Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f2394370c16c7a…

MALICIOUS

PDF

33.3 KB Created: 2020-08-31 04:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b30d419edc67337478b294927139aed4 SHA-1: cce495f0fc2fb736e0562aa5ab7968d8ce5bc8a6 SHA-256: 10f2394370c16c7ac80f2ef4e0748674d346ec1d7a5606c5473bfcd18c04499b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify, designed to appear as a link farm. One prominent link, however, directs to a known malicious redirector. The document's content, though heavily obfuscated, includes the malicious URL and keywords related to a video game, likely to attract clicks. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector confirms a phishing or redirection 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=subnautica+cyclops+depth+module
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5534/1977/files/xigizizokiki.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/bengali_book_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/53229957639.pdf
    • https://cdn.shopify.com/s/files/1/0435/0047/0438/files/actuators_types.pdf
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/10561886636.pdf
    • https://cdn.shopify.com/s/files/1/0435/7318/2625/files/7750896330.pdf
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/11346351110.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/keginubanewilita.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/10981589709.pdf
    • https://cdn.shopify.com/s/files/1/0429/6146/9596/files/edexcel_gcse_physics_9-_1_answers.pdf
    • https://static.usrfiles.com/ugd/b8c837_42eccfa6e4cd4a4082202e7c8a726db6.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecf32b164afe4548832fa7b57a86ce66.pdf
    • https://static.usrfiles.com/ugd/74c34a_093293da310a490f88ccfa79cd2c542a.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_off000044dd.bin
e6a28a4cbecae0be9a1dc7ed59ced0ccd23752ddb024082c41a69287c654b0f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x44DD 5564 bytes
font_01_sfnt_off00005795.bin
b0466069f1c416615bdbb841e3414f5f0203b124f06b0b653bd380ae5ddc15c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5795 9692 bytes