Malicious PDF — malware analysis report

Static analysis result for SHA-256 3371454b91cfaee8…

MALICIOUS

PDF

44.6 KB Created: 2020-08-21 12:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 556545980f09b4416b2d416f3122c2a1 SHA-1: 8713cb0086c343086331e5ece6645811fd3599f4 SHA-256: 3371454b91cfaee8c543101f6b226ba91268a4e33a5481d6f8eeb4adee983681
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=reflections+practice+worksheet+pdf'. This indicates an attempt to lure the user to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious redirector. The document body contains garbled text but includes the malicious URL, reinforcing the 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=reflections+practice+worksheet+pdf In PDF document text
    • http://vuzusavu.thedallesvineyard.com/uploads/1/3/1/4/131437615/toxixudisupu_nofaxugajina_bixojik_tanukopitewemi.pdfIn PDF document text
    • http://files.christfirstjamestown.org/uploads/1/3/1/4/131454984/ce190786019.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/1/0437/7736/0029/files/naruvanesonosufoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/dujutamabuwojogun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/applied_management_science_lawrence_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0426/3585/files/quantitative_aptitude_questions_with_answers_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0544/4259/files/2516988346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/lojukural.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/reviews_of_english_language_proficiency_tests.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9372/8158/files/human_physiology_stuart_fox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/14228856760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/gepateraxigifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4346/9974/files/71982444825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73768917897.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 3

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_off0000706e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706E 5404 bytes
SHA-256: c82c27ce902e128340764dfb0989f7a5d0fa83efb92765ad0ebcfc2fddca1db7
font_01_sfnt_off000082d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D8 10336 bytes
SHA-256: e85694b823608d7ba7c2b02236922be56b030716a259146314957e23c9226442

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