Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d5c4a74a9a33a3…

MALICIOUS

PDF

32.6 KB Created: 2020-08-08 14:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dd0d0dd39efc6321977521fac8b6eac6 SHA-1: 32e8020c2edaafe771954a2d2098942762c70683 SHA-256: a2d5c4a74a9a33a3e13f3a83d8355bf8e8454553d1be558b27d911185c8545bd
174 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'drinks menu', which is likely a pretext to drive users to malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports malicious intent.

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.cc/pify?keyword=frankie+and+bennys+drinks+menu+pdf In PDF document text
    • http://botej.healingbodytherapeutics.com/uploads/1/3/1/4/131453540/mimukekumudino.pdfIn PDF document text
    • http://files.oled-a.org/uploads/1/3/1/3/131380467/48f39ce1ca.pdfIn PDF document text
    • http://woxodoze.zalanfloors.com/uploads/1/3/2/8/132816066/8122250.pdfIn PDF document text
    • http://files.pandanaturalsspa.com/uploads/1/3/1/3/131380440/1246946.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0379/5877/files/adenoiditis_hipertrofica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8581/5205/files/4734954556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/sukunulaginonumititiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/83461710551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/centrifugal_compressor_performance_curves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2771/0630/files/53830917725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9906/0392/files/articulo_amenaza_de_parto_pretermino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/walaxazizabazafosit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9822/7353/files/11225555570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/sewadanuxirinuvulelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/8065614212.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44C8 5416 bytes
SHA-256: 39ccb1b973e8a9a9a220fa9a3f8bf411efa52065bb88ec78374b4a420b23870c
font_01_sfnt_off00005723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5723 9000 bytes
SHA-256: 17fa0d8c113ed9efbedaf364778065b13fa9551f6f248cd811cf8b97cc1f4b11

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