Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc98f0cdbb3d6da…

MALICIOUS

PDF

53.8 KB Created: 2020-07-30 20:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 439e87c8275a87eedd85c7d45531c8e9 SHA-1: f5593ac5390d88c6e675108fe9e8e5a777c1b957 SHA-256: 7fc98f0cdbb3d6da37657e4e375ecb3642888f9c561dc9b871a7e64555ccd6a5
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary redirector URL is 'https://ttraff.ru/pify?keyword=interview+questions+and+answers+for+software+engineer+pdf', which is also flagged as an SEO link farm. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to lure users to malicious sites, likely for phishing or to download further malware.

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=interview+questions+and+answers+for+software+engineer+pdf In PDF document text
    • http://files.jahafrica.com/uploads/1/3/1/4/131438539/tikifoporeba.pdfIn PDF document text
    • http://files.thewrightauthor.com/uploads/1/3/1/4/131407709/vuzivalebi.pdfIn PDF document text
    • http://files.toddphillipsmusic.com/uploads/1/3/2/3/132302716/volajixotepedu_fevikawadidemij.pdfIn PDF document text
    • http://files.sunpawco.com/uploads/1/3/0/7/130740357/5894626.pdfIn PDF document text
    • http://files.vanvolleyleague.ca/uploads/1/3/0/8/130874642/zavixav.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/1/0431/0266/6914/files/xipuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0718/8898/files/mikukode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/nukuverolapotem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/julamul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1921/3727/files/1568712076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/62200013540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/71464844332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/97098861283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4636/2533/files/72499177727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/gusar.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 8

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_off00009471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9471 5272 bytes
SHA-256: f86e0477a2e147ea33e12498c9ae30b012242b6bedea80dfb6684c51a6b71751
font_01_sfnt_off0000a67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA67C 10408 bytes
SHA-256: 7bce27a59296624256e82b28258683cef8490e2fb1519ea1eba7a9c58da3cab0

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