Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7aeb0d9e2d4c3b…

MALICIOUS

PDF

46.0 KB Created: 2020-08-02 18:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9157f6e0b5a2105eaba43b8c8af5560 SHA-1: 6527bd3f29e2dd6d5de546dc386803087b48c66a SHA-256: 0e7aeb0d9e2d4c3b92c88025ffd1e675e256046527870a1292e38dfa3e9a5adf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with the primary URL pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed as a link farm, likely to distribute malware or conduct phishing. The ML classifier also strongly flagged this sample as malicious.

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=iso+ts+16949+2009+pdf
    • http://files.minorclassicsrestorations.com/uploads/1/3/1/4/131453288/6766779.pdf
    • http://files.expandedhealing.com/uploads/1/3/1/3/131383548/6e7442.pdf
    • http://files.esproductions.net/uploads/1/3/2/6/132680796/76bc2ca.pdf
    • http://files.nuwage.net/uploads/1/3/1/8/131856125/zewulapito.pdf
    • http://files.rockvalleydistillery.com/uploads/1/3/0/7/130775002/wofigo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1337/3084/files/30483049470.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/nevoteludofarogeti.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/27068215334.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/dagigo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/58657731079.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3414/files/58246485283.pdf
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/19448254958.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/30528963140.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9588/files/employment_law_for_business_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/4516/5975/files/27582409340.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/58469191047.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/35690397216.pdf
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/favidukus.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/9702123487.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/3474322846.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_off000067d7.bin
dc3332fe8c36b4dec7b49bfcacdad7393d8f53661c419448290f76e157b184f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D7 4872 bytes
font_01_sfnt_off00007870.bin
c3bdd4b41d17ae23fd423da5d7e0f0d399909026464915db1f22dac81e351523		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 10692 bytes
font_02_sfnt_off00009c72.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C72 4324 bytes

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