Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a852a248a52f1ab…

MALICIOUS

PDF

41.7 KB Created: 2020-08-19 07:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cc30873c069f4faaeea9be835c92015 SHA-1: b74993b24e179f2bcd60391d690bc62ff46352bd SHA-256: 9a852a248a52f1ab236d9b7ff31426db4ac9c517c4559bcd1ade22dff02789df
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=test+cross+genetics+worksheet'. Additionally, it features a large number of external PDF links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. The presence of these elements indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=test+cross+genetics+worksheet
    • http://files.jessakid.com/uploads/1/3/1/4/131483955/dimosadizib.pdf
    • http://mamasax.noexcusesbrandshop.com/uploads/1/3/0/7/130776257/vasubenuna.pdf
    • http://files.barthenheierconstruction.com/uploads/1/3/1/4/131482975/8723964.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/butazefexodeke.pdf
    • https://cdn.shopify.com/s/files/1/0454/1788/9960/files/julikedozakamuroruxosono.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3117/files/angular_7_format_input_date.pdf
    • https://cdn.shopify.com/s/files/1/0440/5706/7685/files/tuwemogodopobep.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/59336484488.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/77647256708.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/osrs_dragon_slayer_guide_f2p.pdf
    • https://cdn.shopify.com/s/files/1/0446/6363/6131/files/refrigeration_and_air_conditioning_short_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/jexenosi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000667a.bin
fb254d3c66b297d90ddd3b4379924f24cf65a15e6bf6f5a7cf62f11281484912		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667A 4924 bytes
font_01_sfnt_off0000774d.bin
be2d7dc3f74fcb6a3fe974ed405300befa906645d17ec475d7a4b36dc857396c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774D 10288 bytes

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