Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f85e32d66c50d36…

MALICIOUS

PDF

48.5 KB Created: 2020-08-16 14:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 413887360840361d3271824925daca4b SHA-1: 555e943910a9ced914a8fcbf3a1ac7a2b94a2c11 SHA-256: 0f85e32d66c50d36c4576dda9da9a53d5a7c053c8227d37d5708b14f52d8ca98
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body also contains this URL, suggesting an attempt to lure users to potentially harmful content. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=electric+scooter+reviews+consumer+reports
    • http://ximusodi.chubtoneguitars.com/uploads/1/3/1/3/131383651/jijeluxisiburotul.pdf
    • http://files.rrhsartclub.com/uploads/1/3/1/4/131453354/7613e41d43661.pdf
    • http://nuzavavij.katyscorral.com/uploads/1/3/1/4/131483281/watemedakawizi-mubuz-binelomedazo.pdf
    • http://files.willowfree.ca/uploads/1/3/0/7/130740344/xiwodufa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/calculus_early_transcendentals_8th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/70866699575.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9880/files/86500326417.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/74101746330.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/bilurazuga.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/78030508177.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9272/files/73088972808.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0025/files/anestesia_general_efectos_secundarios.pdf
    • https://cdn.shopify.com/s/files/1/0439/0889/0792/files/fipovowodebibakin.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/98142929549.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/wonajutuxufewawobovedis.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_off000080fa.bin
d634c0b474ae9323177c3d9988fe43ffb8e6c9f980cf0d7ee087df21d052015d
pdf-font-stream PDF embedded font (sfnt) at offset 0x80FA 4980 bytes
font_01_sfnt_off000091ed.bin
d218b7af7974b51087ba7a8b4ba5fbf5324dcd3f0e72062fbc1b7df192c0839a
pdf-font-stream PDF embedded font (sfnt) at offset 0x91ED 10288 bytes