Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c3132d6e30b78e…

MALICIOUS

PDF

113.3 KB Created: 2020-07-25 02:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76737841340bd81f648f630ce7565886 SHA-1: 6c5723ab82e93ba26e0d4a39bbdbbfeb8dec8a09 SHA-256: 69c3132d6e30b78e52e94d80b80ff61bb317cf020dd240fac521736dacfedc7a
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it is a malicious redirector and part of a link farm, with one primary URL pointing to known malicious infrastructure. The document body, though obfuscated, contains text related to 'arrest warrant affidavit template', aligning with a lure to trick users into clicking the malicious link. The ML classifier strongly flagged this PDF as malicious.

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.ru/pify?keyword=arrest+warrant+affidavit+template
    • http://files.smartstartdriving.ca/uploads/1/3/0/8/130814408/6543536.pdf
    • http://files.laurajohnsonmarchisella.com/uploads/1/3/0/7/130775659/wemev-tigaxalel.pdf
    • http://files.childwonders.com/uploads/1/3/0/9/130970009/dobajosepo-ludezemawunu-jadiriw-fagiko.pdf
    • http://files.soulelectricliving.com/uploads/1/3/1/0/131070291/4bcae23b5338c.pdf
    • http://files.bneideffer.net/uploads/1/3/1/0/131070702/3106335.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxepetumikikexozifaxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3837/4050/files/1300386321.pdf
    • https://cdn.shopify.com/s/files/1/0435/8547/0623/files/74595959562.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/37841735873.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/96245598185.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/pemobifufufomadasixidibo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/91981883124.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3151/files/63188287361.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/25146002659.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65022979336.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6491/files/direbesipun.pdf
    • https://cdn.shopify.com/s/files/1/0438/2785/5522/files/vapafesafi.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_off00018208.bin
dfe5c9587d6323f55388064c92f578f309a43a6921787d264c1a58a7fcc68081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18208 5004 bytes
font_01_sfnt_off000192fa.bin
c81b36623cd643e094eacbbf03034ff533786be47fbef0ea7814dde1653c905e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x192FA 10748 bytes

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