Malicious PDF — malware analysis report

Static analysis result for SHA-256 74886a7ef4534cec…

MALICIOUS

PDF

42.6 KB Created: 2020-08-06 20:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c43fc78db332f42f3d0b5f356029a75b SHA-1: 349c376ec5528fc8bc17f8c983feda3d872ae7ab SHA-256: 74886a7ef4534cec752c2b081e1546fb096918b6fa2549b2adbd51d094f59765
154 Risk Score

Malware Insights

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

The PDF contains a link farm with 26 external PDF links, many hosted on Shopify, and a primary link to a known malicious redirector. This indicates a likely SEO manipulation or content distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to drive traffic to malicious or deceptive content, potentially as part of a phishing or malware distribution campaign.

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=albinismo+tipos+pdf
    • http://files.computerscpr.com/uploads/1/3/2/7/132740860/xubujolodosetejokuv.pdf
    • http://files.gabeeyrich.com/uploads/1/3/1/4/131452836/lareta-paduromede-lomalovumuko-vefupopefasos.pdf
    • http://files.saudiref.com/uploads/1/3/1/8/131871556/taluwe-vulekokozagasi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/zajudofopuwogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0699/2289/files/bibliografia_apa_de.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/luxofedabuvosiva.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/liwukepurenugiweda.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/85087868015.pdf
    • https://cdn.shopify.com/s/files/1/0433/4311/8495/files/71651779065.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/41280343379.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/5861803483.pdf
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/popular_nightbot_commands.pdf
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/curso_de_adestramento_canino.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_off000068cc.bin
41bcae24f67a9cd03eb21a34559a711ef108e90dad8d5ace0ebc9b87b966b58b
pdf-font-stream PDF embedded font (sfnt) at offset 0x68CC 5008 bytes
font_01_sfnt_off000079c2.bin
ffebfac28369129240dc9c0b59c3e37a180040a1b218a86b4021e80f92b3d5fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x79C2 10636 bytes