Malicious PDF — malware analysis report

Static analysis result for SHA-256 6811f567d88c3fb7…

MALICIOUS

PDF

41.4 KB Created: 2020-08-18 20:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d732dae96cadf00e5688e0b6f033a93 SHA-1: 658f9d61f301c28a491cfde85a971b65d06635c4 SHA-256: 6811f567d88c3fb7c606681022a90e80def2eab47e407a088a09592a3e5cb3a6
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a search query, which is a common social engineering tactic to trick users into clicking. The link leads to a redirector, which is a critical indicator of malicious intent. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation to distribute malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs strongly indicate a phishing or redirection attack.

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=best+greatest+weakness+answers
    • http://files.commasense.net/uploads/1/3/0/8/130873987/xuzuzivul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/bafisumomibugumifo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2010/6404/files/stalking_jack_the_ripper_vk.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8203/files/33211871554.pdf
    • https://cdn.shopify.com/s/files/1/0434/0704/8860/files/kilosilasuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/8729/7696/files/dimefenotino.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8770/files/32740776927.pdf
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/54179042520.pdf
    • https://cdn.shopify.com/s/files/1/0428/5349/9046/files/powers_season_1_episode_9.pdf
    • https://cdn.shopify.com/s/files/1/0430/5394/0887/files/59678821599.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/bavowurexig.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/42390691687.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/3066268191.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_off000063a1.bin
6c0a49854567ffe99b659b1c94b141ef6bf79e3d234cb89fc53f3ceed08e6a2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 5028 bytes
font_01_sfnt_off000074e3.bin
b5d00486c939d1e11ba246b61bcffc067789e40fc124651a2ac733dbbae56074
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E3 10516 bytes