Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f44a496736d58e1…

MALICIOUS

PDF

49.0 KB Created: 2020-08-25 01:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 447a6bd4a3e6f60e7fd4b35e713ab426 SHA-1: 02d8ff79ebeeed17b87ed137751df8b0a9489337 SHA-256: 6f44a496736d58e10ccd682203b010f0d0b6d9d344023d2674e4e6a6d802606c
182 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text suggesting it is a policy template, which, combined with the malicious link, indicates a phishing or scam attempt. The presence of numerous external links, many pointing to Shopify, suggests a link farm used to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/pify?keyword=fcpa+policy+template
    • http://files.heroesofcolor.com/uploads/1/3/1/3/131380063/5359549.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/jamexoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/26439239941.pdf
    • https://cdn.shopify.com/s/files/1/0434/4234/0007/files/tuvijatog.pdf
    • https://cdn.shopify.com/s/files/1/0429/1257/9747/files/gamiwunufupam.pdf
    • https://cdn.shopify.com/s/files/1/0456/8793/1039/files/kth_phd_thesis_template_latex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/boruxunijutaki.pdf
    • https://cdn.shopify.com/s/files/1/0445/7473/6543/files/apache_hive_definitive_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4485/5193/files/donadori.pdf
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/ielts_reading_practice_academic_2018.pdf
    • https://cdn.shopify.com/s/files/1/0429/2267/2284/files/transport_canada_holdover_time_guidelines_2019.pdf
    • https://cdn.shopify.com/s/files/1/0435/0384/5541/files/17518959166.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_off00008344.bin
701009c4c709be4f99917f3ec966a09355d22f80e3040acb886583395690c2ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8344 4864 bytes
font_01_sfnt_off000093c8.bin
50d9ab2dbf746e06bc14c746f8f9460b86220e9309bdab49b8d18550cfa05618		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93C8 10580 bytes

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