Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e409b960829d95a…

MALICIOUS

PDF

142.0 KB Created: 2020-08-15 04:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3521449be5f32d95633ac866bcc3b7aa SHA-1: 0c0d9bc235632079f73c5dd7356e609288052212 SHA-256: 7e409b960829d95adff1e9835772697ec72203705a53943f553cf688d68c1122
182 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to further malicious content. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=ffiec+interagency+guidelines+on+breach+response
    • http://files.kierstinbible.com/uploads/1/3/0/8/130813420/6503549.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5409/4753/files/79228007934.pdf
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/kalamazoo_craigslist_org.pdf
    • https://cdn.shopify.com/s/files/1/0454/9564/8408/files/definition_of_industrial_economics.pdf
    • https://cdn.shopify.com/s/files/1/0451/5692/5594/files/biochemistry_for_nursing.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/72433740993.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/risc_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/62560659220.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/66268359779.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/wuramanef.pdf
    • https://cdn.shopify.com/s/files/1/0430/6960/4001/files/77991868678.pdf
    • https://cdn.shopify.com/s/files/1/0435/8252/1512/files/52016155898.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_off0001ed44.bin
4283dcc9435e16aa4f1249c6a2988ab9dd5de2b269560a46b25a9a4564ad6052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED44 5616 bytes
font_01_sfnt_off00020059.bin
acbc2ae6ff1ce0a9b156dd94779ee2f51859aafb53d3d2cc09312bfedb387812		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20059 12948 bytes

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