Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d04ee29feee0f56…

MALICIOUS

PDF

52.2 KB Created: 2020-07-29 18:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 351e950e3f758b85a93b119a1f18fe62 SHA-1: e4cbaf69d2500f932c1611407c679fd898ef3a7a SHA-256: 6d04ee29feee0f56f7a9f32688f9797c1567c722a67d97557d8e31fff64b24a6
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector (ttraff.cc). The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm designed to attract traffic or distribute malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious links and the link farm structure points to a phishing or malware distribution 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.
  • 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.cc/pify?keyword=persuasive+letter+writing+template+pdf
    • http://files.chanble.com/uploads/1/3/1/8/131856409/sujaj.pdf
    • http://files.kathrynjfogleman.com/uploads/1/3/1/8/131856188/laxiwufovob.pdf
    • http://files.spencersnygg.com/uploads/1/3/1/1/131164310/rikewituxofob-basakukom-virobumavewi-pokajite.pdf
    • http://files.cambria-bailey.com/uploads/1/3/1/4/131437680/3920212.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4380/5594/files/gejalulamob.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4160/files/ruwisoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/21785592396.pdf
    • https://cdn.shopify.com/s/files/1/0432/5638/1597/files/savituxim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rijakilijupefiwopoxafeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7581/files/33929127796.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/98836511226.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/46721583967.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/niduripigizebe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/pomil.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/19444826539.pdf
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/33402929818.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/jumimes.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/14308256370.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_off00008ed4.bin
b94645ef5a591e3913ac774b739fe32acd83dd66bf24b25d7292ab78dad4b999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED4 5284 bytes
font_01_sfnt_off0000a0c0.bin
16419b3668557be59102209c95e13e384375014e4ecd59eb781077f1ce861b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0C0 10272 bytes

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