Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d38b18e40a240ed…

MALICIOUS

PDF

38.1 KB Created: 2020-08-11 02:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 407e4a783c40a5a2d07a7af11c7d6481 SHA-1: 72fd6cf604e33e7f3b9d65ddfa77be0ddaf4c03d SHA-256: 0d38b18e40a240ed5115b0cc1dfbd9b89d456f7856ab43d52e213c2f24503233
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). This indicates an attempt to obscure the final destination and potentially distribute malicious content or conduct phishing. The ML classifier strongly supports the malicious nature of this document.

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=barashada+xisaabta+pdf
    • http://files.hotelselloffs.ca/uploads/1/3/1/4/131453843/9846732.pdf
    • http://lavijutaf.newportplant.com/uploads/1/3/1/8/131871699/1155385.pdf
    • http://files.raveneyeimagery.com/uploads/1/3/1/4/131409305/8511430.pdf
    • http://jupaz.thegoodgatherings.com/uploads/1/3/1/4/131452938/abd49d7edd8e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4958/9668/files/integral_calculus_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0433/2837/2904/files/alimentos_ricos_em_fibras.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/90043084153.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8310/files/fazexetubupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4220/9945/files/90297532710.pdf
    • https://cdn.shopify.com/s/files/1/0434/0344/4387/files/fomeni.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/17998977758.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/tevavenavifuxakopet.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/66080808137.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/76903551521.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/actos_administrativos_concepto.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_off00004c4e.bin
97164bc4668021496b6a01da7a127dac35165bab8be43ef6d04317396d1b76f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4E 5352 bytes
font_01_sfnt_off00005e7b.bin
b347aa167d7d4d2c76934346c87b1d5c70f7fafc25b71fa91a710181860d5a7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7B 14560 bytes