Malicious PDF — malware analysis report

Static analysis result for SHA-256 057237497fa04a13…

MALICIOUS

PDF

58.8 KB Created: 2020-08-01 10:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7d6641842af4b3b2f2eb2dde8955dae SHA-1: b066d636b7a43e9282e835b91acd5d7f1a777c8d SHA-256: 057237497fa04a13729cad4d9ac8e3f808ac3df9265536f1ac3e0ce20574f588
174 Risk Score

Malware Insights

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

The PDF contains a lure related to a 'ps3 cover template' and embeds a large number of external links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or SEO manipulation tactic. The presence of the malicious redirector URL and the callback lure heuristic indicates a phishing or scam attempt.

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.com/pify?keyword=ps3+cover+template
    • http://files.clarkredangus.com/uploads/1/3/1/3/131381078/bajinebopu.pdf
    • http://files.brandedelementsllc.com/uploads/1/3/1/6/131606046/9d56d728ea8badb.pdf
    • http://files.virginiavaughan.com/uploads/1/3/0/7/130739155/0ab74255.pdf
    • http://files.fitrev.com/uploads/1/3/2/6/132696154/kigugim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/67870176000.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/gafobapopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/30993835232.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/sivisukitanusixabepu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9973/files/81413795268.pdf
    • https://cdn.shopify.com/s/files/1/0429/0497/7564/files/losidasafolobito.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48787523288.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0734/files/81858415254.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11783771814.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/28416078548.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_off00009ecb.bin
dd0f12c5c442b0ae7fb0b7ab5603b427ee1ef31394b817289063e46bd33efb71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ECB 5304 bytes
font_01_sfnt_off0000b0c5.bin
38399f14dc98d5fee2aec08a218917f8a02c7ed6973b582b042ccd6616f19d12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C5 14856 bytes

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