Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ef597396d0776e…

MALICIOUS

PDF

62.8 KB Created: 2020-08-26 13:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09774c8f0b442f2be6e31dda52756176 SHA-1: 26d0e6bdfc4bfd5608cf0b36339abbb9d311909a SHA-256: 01ef597396d0776ea610f9f43f4e605f8a3b79ec36b38b0bb063988b02529dca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO abuse tactic. One prominent link directs to a known malicious redirector, indicating a potential phishing or malware distribution attempt. The document body itself is largely unreadable, but the presence of the malicious redirector URL is a strong 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.com/pify?keyword=en+attendant+godot+sc%25C3%25A8ne+d%2527+expositi
    • http://files.evansalumni.net/uploads/1/3/2/6/132682925/detopinigoji-zolamunofajo-ragupe.pdf
    • http://files.michaelderjabin.com/uploads/1/3/1/3/131379059/7918897.pdf
    • http://gajutisif.hemetwestvalleyffa.org/uploads/1/3/1/4/131453033/7594888.pdf
    • http://zupopo.yeyeluisahteish.com/uploads/1/3/0/7/130775373/nujosazunan-wugupes-sovesevab.pdf
    • http://files.juhasorsa.com/uploads/1/3/1/3/131398140/5445781.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4301/9157/files/danezafedefexidopi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9318/0070/files/acland_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/facebook_photos_original_resolution.pdf
    • https://cdn.shopify.com/s/files/1/0435/2249/0532/files/android_caller_name_finder.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2821/files/pupiwixo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9632/4758/files/splice_vs_slice.pdf
    • https://cdn.shopify.com/s/files/1/0432/5185/9611/files/rukividabejagesumeban.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7626/files/lujenekatatigupupup.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/iterator_java_example.pdf
    • https://cdn.shopify.com/s/files/1/0440/6575/1192/files/xepadalufew.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_off0000b3a2.bin
0c1285453c50069131cfbf94208874a6a2c7f63fb33bdc5a1aafc19fba1a7fed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A2 5312 bytes
font_01_sfnt_off0000c590.bin
5ce5dc831ffbd22c2db9043735f56b8de1f7c30cea0b67072edb061b04ab2fc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC590 12464 bytes

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