Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f21a3dc1e927449…

MALICIOUS

PDF

42.0 KB Created: 2020-08-12 04:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 34ef9f9a57a2e0382df5fa6c87bbb4ec SHA-1: 5b461705fef70122181d2719cfcbb70fb8496f44 SHA-256: 2f21a3dc1e92744925c9729aefb639757b648de10cf4af631cdb9622a768fd91
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=assessing+and+evaluating+student+learning+pdf', is designed to lead users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=assessing+and+evaluating+student+learning+pdf In PDF document text
    • http://files.rockwoodtennis.com/uploads/1/3/0/7/130739522/7385887.pdfIn PDF document text
    • http://files.maggieshao.com/uploads/1/3/1/1/131163969/93a88.pdfIn PDF document text
    • http://kofeture.allterrainmotorsport.com/uploads/1/3/2/6/132682787/livukedo.pdfIn PDF document text
    • http://rovavu.kambellishments.com/uploads/1/3/1/4/131407406/d98b19056a9fbd7.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/1/0428/7578/1276/files/64993501911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/jisumexufukakigexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/kawekev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/13040351059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6567/0806/files/acarbose_50_mg_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6284/5859/files/24340765701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9942/1856/files/49963279831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/vokuvaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/vokewotew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/cambridge_english_complete_key_for_schools_student_s_book.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 4

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_off0000677a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677A 5256 bytes
SHA-256: 579c6301c032779e2eee9db88fe1e7dd50c2e9ac8e50cf2ef8d6df8962094b95
font_01_sfnt_off00007966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7966 9928 bytes
SHA-256: a5c239065d73e10c57657dd3cd25667abc0f9d81ea50cb36d9961248e19c8264

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