Malicious PDF — malware analysis report

Static analysis result for SHA-256 b853761e332ff57a…

MALICIOUS

PDF

54.8 KB Created: 2020-08-06 08:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 60a8c0a324a03024f0e0ea0ac1a5d77e SHA-1: fa9d9d4763a9ed524f3815d761bebb4909b6723f SHA-256: b853761e332ff57ab568640845dec366e6b7b3f5f659b26fdc0b7565b227c30f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=auditoria+operacional+concepto+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains a reference to the malicious redirector URL. The primary attack pattern involves luring the user to click on a malicious link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=auditoria+operacional+concepto+pdf In PDF document text
    • http://files.boarsheadleather.com/uploads/1/3/0/9/130969682/a0c8103ae.pdfIn PDF document text
    • http://files.crestllc.com/uploads/1/3/0/7/130776208/8833660.pdfIn PDF document text
    • http://files.mltcoins.com/uploads/1/3/1/3/131379375/baf81aa76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/memiwalilofut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6975/8874/files/ruvabilarodusan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/gujezof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3203/4976/files/danax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/11565881452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/ximefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9154/9590/files/bugaboo_cameleon_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/75388085167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/setolazizemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/lonul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/95718456578.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000963e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x963E 4960 bytes
SHA-256: c8bd4216c3bcc02558b8f796c64663181aa759475926443639a08175360836e6
font_01_sfnt_off0000a72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA72F 11632 bytes
SHA-256: 9ba8bb5ba6972aca5e8a8e1ad6d99b3ad916091f37568dd8a85c04ed28e9811f

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