Malicious PDF — malware analysis report

Static analysis result for SHA-256 1311d8289b9f0c43…

MALICIOUS

PDF

40.1 KB Created: 2020-08-12 02:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f233f1f4db0ca842317b1a6d8204979 SHA-1: 3806e25d0f3a32d87089fde7b8f94872d71169e4 SHA-256: 1311d8289b9f0c4311fc1b65d1562738dbdeada571a03be780337df8752eaaba
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body and embedded links suggest a lure for SEO spam, aiming to drive traffic to potentially malicious or unwanted content. The presence of numerous external PDF links further supports this SEO spam campaign.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=software+to+convert+pdf+to+editable+word+document+free+download
    • http://files.jancancan.com/uploads/1/3/1/4/131406413/sosazidisajawaj-ledosol-vaxodavuv-ziwobedomanefon.pdf
    • http://fabamavi.ainesboutique.com/uploads/1/3/0/7/130776418/kenujugotomobifavax.pdf
    • http://files.conservationsupport.net/uploads/1/3/2/6/132681443/xekugu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/47220570349.pdf
    • https://cdn.shopify.com/s/files/1/0432/0886/8008/files/76434371610.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/5372607197.pdf
    • https://cdn.shopify.com/s/files/1/0429/3384/6175/files/dofunipelupifo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/64790063065.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/86729954671.pdf
    • https://cdn.shopify.com/s/files/1/0437/9010/6775/files/azitromicina_900_bula.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/62527452815.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9236/files/98305998458.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7372/files/dixatejepesitiverekaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/difumodojiberapuzos.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1098/files/pebivinemogelufak.pdf
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/fundamentals_of_astrodynamics_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/6th_grade_adding_fractions_worksheet.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_off00005e5a.bin
93f73075cdf277c76bbba0181933d0933109a3f6c1d66b74f34a7be0b0ed8f18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5A 5516 bytes
font_01_sfnt_off0000710d.bin
0092e756abd13ae1e7ed30344b7077377b761537d3ae829edbdc4b83116b0b6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710D 9824 bytes

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