Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4b74c108353728…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 22:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57172a5c9e87413cde3f6a336a138e36 SHA-1: 6fa0caf0b669747217c0ba67ec3f690908d7be63 SHA-256: bb4b74c108353728f4ca69156cb0c6b2da5062123f4d755324dc34f5f656d7b0
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure related to 'accounts payable receivable interview questions answers' and embeds multiple links. One of these links, 'https://ttraff.ru/pify?keyword=accounts+payable+receivable+interview+questions+answers', is identified as a malicious redirector. The document also features a large number of external links, many pointing to shopify.com, suggesting a link farm or SEO manipulation tactic. The presence of a malicious redirector link combined with the invoice/payment lure strongly indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=accounts+payable+receivable+interview+questions+answers In PDF document text
    • http://fulix.pokingdeadthings.com/uploads/1/3/1/1/131164250/vazuzi.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/1/0431/8786/3715/files/punctuation_worksheets_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0633/6925/files/96766526582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3584/0932/files/dtic_technical_reports_collection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/75847309826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/22822459568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8904/0294/files/clsi_guidelines_mic_breakpoints.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4996/6998/files/nuxomudisolukutedetizana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/chemistry_study_guide_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/0973/2771/files/himalayan_university_bsc_mlt_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/9580/1253/files/iq_test_questions_and_answers_for_interview.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/11166673771.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
🗂 Part of campaign: advanceddentalimplantstudies.com 4 samples

Related samples 1

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_off000063ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AC 5436 bytes
SHA-256: ff302d10af34d3c3f668bb084a873d40885214235eaa135d7ac905d0dd3cc66a
font_01_sfnt_off0000764e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764E 9812 bytes
SHA-256: 552a733f808b9e6305139c4f648f7b0c09be74155bcc8fc55be06e145f52a65d

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