Malicious PDF — malware analysis report

Static analysis result for SHA-256 7488fb3f39462910…

MALICIOUS

PDF

56.0 KB Created: 2020-08-14 21:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fa36e51095cb7d878acadf38e9c7c50 SHA-1: a40def9a21c045848a848cc1cd0ba395bbbb4e49 SHA-256: 7488fb3f39462910cc6b5ca4b7b62672e16743314b688b279d319517e74b0e63
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to manipulate search results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious redirection attempt.

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=autogenes+training+formeln+rauchen
    • http://vizawuga.sacredlivingspiritualcenter.com/uploads/1/3/0/7/130739616/xowovipuzaxeba-lofax-xolufiv.pdf
    • http://files.sthreeauto.com/uploads/1/3/1/4/131409794/gifatoretaru.pdf
    • http://files.balloontwistersdcvamd.com/uploads/1/3/1/0/131070911/4278832.pdf
    • http://files.walshbotanicals.net/uploads/1/3/1/4/131453121/jigiwuzagebo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/vexazimibepek.pdf
    • https://cdn.shopify.com/s/files/1/0428/5726/7359/files/zodusutezegujokugajut.pdf
    • https://cdn.shopify.com/s/files/1/0428/6359/1583/files/google_map_customize_marker.pdf
    • https://cdn.shopify.com/s/files/1/0428/9986/5756/files/wupamagegob.pdf
    • https://cdn.shopify.com/s/files/1/0428/5300/7516/files/17302412945.pdf
    • https://cdn.shopify.com/s/files/1/0434/8297/2326/files/3184063086.pdf
    • https://cdn.shopify.com/s/files/1/0435/0056/8736/files/o_alienista_em_quadrinhos.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/paxokawerawolumimeno.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3756/files/966944981.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_off0000917d.bin
465494d0e859b675bc04cbaa182cd499f2b64efdf562c7822223c8db85f1497f
pdf-font-stream PDF embedded font (sfnt) at offset 0x917D 5284 bytes
font_01_sfnt_off0000a344.bin
0c587d72fd6532583720f3404c7057a40b25d68cf1804c974d229526947594a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xA344 15844 bytes