Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad622248c59849a…

MALICIOUS

PDF

51.8 KB Created: 2020-08-04 10:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aaa0b0d420e948da389993b1e2d2418 SHA-1: ad8e21466530b275441b8636f1c1c82727e0bb95 SHA-256: 0ad622248c59849af190b7e85ed8d756bd3e528caf160458b8ad8a5a99dac52c
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wb?keyword=alcatel%201c%205009a%20manual'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign Shopify links but others are unknown. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam context. While no scripts were explicitly extracted, the nature of the embedded links and the ML classification strongly indicate malicious intent, likely to redirect users to malicious sites or initiate phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/wb?keyword=alcatel%201c%205009a%20manual
    • http://files.robertbuxtonpianist.com/uploads/1/3/1/4/131453982/lijin.pdf
    • http://files.coviellolandscape.com/uploads/1/3/1/4/131437318/550f2c.pdf
    • http://files.jetvideoonline.com/uploads/1/3/1/3/131380213/kobipelakilefam.pdf
    • http://files.bernardcassiere.fi/uploads/1/3/1/1/131164063/lazezamom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8341/5204/files/19023855197.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/7628215173.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/19802933825.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/21054323213.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/93997934878.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/gobovafewak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0438/0806/3649/files/xejogesudaka.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/10542407303.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/zetavatav.pdf
    • https://cdn.shopify.com/s/files/1/0434/1514/2551/files/reference_equation_latex.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_off00008144.bin
5053efe705c58bd3e4e9ee461d74e862fd8693ba5868dff473429b4dbd636f6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8144 5136 bytes
font_01_sfnt_off000092b3.bin
f13c314d937ba85f9f3bb6d4eddaf2b1fad77a1c56637a6c6867cfec34cc2df0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92B3 2048 bytes
font_02_sfnt_off00009b92.bin
dd5b3fdfd9434ae652b040722fc228b1450c28d6dca0291cb9e68b0e0544a7ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B92 11740 bytes

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