Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7abad13ce623a6…

MALICIOUS

PDF

50.7 KB Created: 2020-08-07 00:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a86d3bd33967b952d174a04ec41ebe50 SHA-1: eb6213e7dcbd809d5338eadb32385fe8f94caa52 SHA-256: 6c7abad13ce623a6cb918320e81c8b35d6c69e775bdd63aceb615f79c7097d36
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links designed to create a link farm, with a primary redirector pointing to malicious infrastructure. The document body, though heavily obfuscated, contains references to a 'maths teacher cv pdf' and a URL that aligns with the heuristic findings of a malicious redirector and SEO link farm. The ML classifier also strongly indicated maliciousness.

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=maths+teacher+cv+pdf In PDF document text
    • http://files.womenartistsreaction.com/uploads/1/3/2/3/132302863/8d22be5d98d153.pdfIn PDF document text
    • http://files.tourtrax.com/uploads/1/3/2/7/132740594/zefoporifowez_mewikapunesoja_medorerex_bubakaw.pdfIn PDF document text
    • http://lupuros.juabchoirs.org/uploads/1/3/0/7/130740178/46b36e969e8bc.pdfIn PDF document text
    • http://files.advantureusa.com/uploads/1/3/1/1/131164185/944c18a09ad0931.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/1/0433/0687/7080/files/89352644259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3970/9605/files/microsoft_excel_formulas_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/52449031027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6612/9574/files/51527006100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/topeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2610/1910/files/52863388557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3666/3208/files/90727337518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/74367503681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5165/5076/files/5329576807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2919/9005/files/bazifugejabuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/31172097994.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_off000086ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86EC 5276 bytes
SHA-256: 7f3739896f795bc26ab387148f3406d693dffd88140b257ca87a15ef5c347191
font_01_sfnt_off000098f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98F0 10904 bytes
SHA-256: 1dbe77d4add413b2def76d64c8ee354fbbeb818cb3ff589941c7b2eaa4cdc02e

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