Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b7951ac0271966…

MALICIOUS

PDF

42.3 KB Created: 2020-08-21 12:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4393225ac2b54f3d9fdcaadb1016c85f SHA-1: d9396fa25233110fb6e66650a6b1309c1b22795f SHA-256: f0b7951ac0271966e03444e9109715e957b021e8b2e02d16d8add26563d1f793
194 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains the text 'Debate about school uniforms should be abolished' and the malicious URL, suggesting a social engineering pretext. The file also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, likely to improve search engine ranking and distribute malicious traffic.

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.com/pify?keyword=debate+about+school+uniforms+should+be+abolished In PDF document text
    • http://pituwuz.school.stmaryspontiac.org/uploads/1/3/0/8/130873952/nupokexu.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/1/0429/2149/2643/files/44787536445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1482/7677/files/76674637820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4460/0999/files/ventral_hernia_patient_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/95507914662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/69541122647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/brick_breaker_world_champion_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5203/0357/files/biwijipivanamaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pitoparejiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/circleci_android_build._gradle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/toefl_reading_passages_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/wordly_wise_book_7_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/wapuzezukidabanutoliz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/8942/3523/files/35295720041.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 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_off00006763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6763 5400 bytes
SHA-256: 9984013367078bf14b13b79b538dffb13aa572ba634bcb0462a6832ec9ce595a
font_01_sfnt_off00007988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7988 10244 bytes
SHA-256: 829b9d00cbded790940967c153429eec70949cd7393626081d74a918a2cec82a

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