Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b7cd0f6e2b65ce…

MALICIOUS

PDF

43.2 KB Created: 2020-08-09 13:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69237299ec14e57df59b319d2a2b84af SHA-1: 5cd529e4718cd55f428ff1ee06483fa9cb7d7a25 SHA-256: 11b7cd0f6e2b65ce87bdcc5a89f2332d31648a5016d69c7265274f006cfd9c57
182 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector infrastructure. The ML classifier strongly flagged this PDF as malicious. The presence of urgency and callback lures suggests a phishing or scam attempt, and the embedded links are likely intended to lead the user to a malicious site.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=botulismo+bovinos+pdf
    • http://files.whestech.com/uploads/1/3/1/4/131406999/kijelubi.pdf
    • http://files.beulahcenex.com/uploads/1/3/2/6/132682739/b409d89.pdf
    • http://files.learningbuildings.com/uploads/1/3/0/7/130738593/d0bca4e72a5134b.pdf
    • http://files.otccomedytroupe.com/uploads/1/3/1/8/131871690/pupip.pdf
    • http://files.hawaiiwaterpolo.com/uploads/1/3/1/3/131398308/23ae1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/86611066422.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9479/files/pepsito_aprendizajes_clave_preescolar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
    • https://cdn.shopify.com/s/files/1/0434/1514/2567/files/nezulobanomav.pdf
    • https://cdn.shopify.com/s/files/1/0437/4151/1834/files/28212765585.pdf
    • https://cdn.shopify.com/s/files/1/0434/8719/9394/files/38069623392.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/buzuvege.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/kemidivosofimi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/jifutavuwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/xelobutotomelorokenuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2323/files/81647130303.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_off000068c5.bin
dd53df65c7cfdd36de7321070b5d6ef5fa647f15f5580a4273bb2c14d5ec345a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C5 5132 bytes
font_01_sfnt_off00007a30.bin
395355172e496aaefd4ce4ccfc27d56bbf6c53b7a6a5d8abcfc2c108e9c863cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A30 11628 bytes

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