Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc6d8142e61b64d…

MALICIOUS

PDF

57.8 KB Created: 2020-08-04 22:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 164e04f1ce2ac1d6d9975905aab8add8 SHA-1: 06c1b767ac341c704f7dc1265d16411fcc4ddca2 SHA-256: 1fc6d8142e61b64d4a927e6ea71598677e1a59bfa714f0768dd9ca21603afddd
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.ru/pify?keyword=bayesian+statistics+for+dummies+pdf'. This indicates the document's primary purpose is to redirect users to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the embedded URL and redirector heuristic strongly suggest a phishing or malware distribution lure.

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.ru/pify?keyword=bayesian+statistics+for+dummies+pdf In PDF document text
    • http://files.informatieoorlog.com/uploads/1/3/1/8/131871864/1495921.pdfIn PDF document text
    • http://files.linkwestapt.com/uploads/1/3/2/6/132680932/dajilevaval.pdfIn PDF document text
    • http://files.brunswicknaturesculpturewalk.com/uploads/1/3/2/6/132695356/2076134.pdfIn PDF document text
    • http://files.rjgrayecology.com/uploads/1/3/2/6/132683154/492346.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/1/0430/6750/6845/files/56417432999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8651/0232/files/mozip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2717/7365/files/newupuxozujuvop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/vajafexofawixavib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/64822452902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4206/8887/files/police_communications_technician.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/ziridewagibiwosetupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/60544896249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/jenulutosivisilap.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 6

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_off0000a13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA13A 5420 bytes
SHA-256: 89539026c602386a30558917f4ff7b9e2d25305a174849b98a99ecf0d278eb4b
font_01_sfnt_off0000b39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB39E 11208 bytes
SHA-256: 72ef10e02ce77697b4888b71129b2a03d8111daab70058ecc7ec22cdf8585865

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