Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ef9e978751bf4e…

MALICIOUS

PDF

43.3 KB Created: 2020-08-04 17:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 715312dbe3ee6f8e2cc42f641d6d5edf SHA-1: 6b72f770b55c2d057d489fdaddcbb6becd7b3a5d SHA-256: d1ef9e978751bf4e2deaed115024eb4ec942fd2ed33feafe0afdbaccfe4537fb
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, a technique often used in SEO spam or phishing campaigns. One critical heuristic identified a link to a known malicious redirector, specifically 'https://ttraff.ru/pify?keyword=counselling+psychology+a+textbook+for+study+and+practice+pdf'. This suggests the document is designed to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting. The presence of many external links, including to Shopify domains, indicates a link farm strategy to improve search engine ranking for malicious content.

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=counselling+psychology+a+textbook+for+study+and+practice+pdf In PDF document text
    • http://files.woodlandsfrenchies.com/uploads/1/3/1/3/131383553/buvomagedax_dopiriveluk.pdfIn PDF document text
    • http://fikoka.infinitely-natural.com/uploads/1/3/1/1/131164312/c3ab280ac299076.pdfIn PDF document text
    • http://files.pointblankdesignstudio.co.za/uploads/1/3/0/8/130813818/kixasizo.pdfIn PDF document text
    • http://files.makingagoodlifebetter.org/uploads/1/3/1/6/131607544/2d88ef7b73a.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/1/0436/9930/6648/files/35281637405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/remafunijonisakat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/juvukoletadiwak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/17689976041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/nevukamowuzebejelezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/pimalovow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/92592129567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/stock_market_lessons_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5928/0022/files/12966480523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/43029527909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/37693014018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1887/8114/files/classical_mechanics_taylor_solutions_manual_free.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_off00006644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6644 5696 bytes
SHA-256: a9abee9122177ef8f8ec59e1a834872963ececbbb144b35b9e283fc6add75231
font_01_sfnt_off000079a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A8 10656 bytes
SHA-256: e48898c2426961413691adabe7381c4052832b88831f036e0b2fbfb73f91cc68

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