Malicious PDF — malware analysis report

Static analysis result for SHA-256 67103b5ca926c145…

MALICIOUS

PDF

41.0 KB Created: 2020-08-23 02:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c6d19b43767b4608c7182c78cf6ac36 SHA-1: 21cbe7940168d8ce1d2c0ab2dc4d9eb3fecc3cc7 SHA-256: 67103b5ca926c145066b200fe0feb77b8b6f5d95af91cd992d4065c29042bc7b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. It also hosts a large number of external PDF links, many of which are hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness, supporting the presence of malicious links.

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=square+root+of+243+in+radical+form
    • http://meluxuf.theheartofgolf.com/uploads/1/3/0/9/130969191/nabudetosabowotewaw.pdf
    • http://paxefo.annabellalwin.com/uploads/1/3/1/4/131453463/xanoliwewutamej.pdf
    • http://puzege.phisigmapidavis.com/uploads/1/3/1/3/131379730/sujipijelenewurex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/katedaso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/smartsheet_training_nz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/nazafejibegeluferofo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8916/files/79420627949.pdf
    • https://cdn.shopify.com/s/files/1/0440/7682/6789/files/6699414574.pdf
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/xijosixuwizivotasu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/30789805473.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/31998169982.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/72891894104.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/vilofaloxisafokon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000542f.bin
1664832449e378fff3a7c266913f665612f611241d88f73afe1f5285aff33393
pdf-font-stream PDF embedded font (sfnt) at offset 0x542F 5484 bytes
font_01_sfnt_off000066ba.bin
23e142771cd84cae07fac4a5ec4ee10e70ad41ef86331cefbdb7758fd68bdad5
pdf-font-stream PDF embedded font (sfnt) at offset 0x66BA 10160 bytes
font_02_sfnt_off00008946.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8946 4324 bytes