Malicious PDF — malware analysis report

Static analysis result for SHA-256 784f61bc0546b895…

MALICIOUS

PDF

40.4 KB Created: 2020-08-13 23:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8cfc5ddfd45f45c2f9a6dff1c7ebf60 SHA-1: c1517e70fa80344ed8f913ab93deafacc0e2516e SHA-256: 784f61bc0546b89578d0425473252fb86aa9604d4172d416bfa9d653f218a4ab
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector infrastructure identified as malicious. The document body text, though garbled, includes phrases like 'Go formative answer key' and a URL that aligns with the malicious redirector, suggesting a phishing or scam lure. The presence of a large number of PDF links also indicates potential SEO manipulation for traffic generation.

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=go+formative+answer+key In PDF document text
    • http://files.almamusicstudio.com/uploads/1/3/1/4/131409693/2c72f055d632c0.pdfIn PDF document text
    • http://files.mikekleeman.com/uploads/1/3/1/4/131437322/52202.pdfIn PDF document text
    • http://files.rebeccalynnphotography.net/uploads/1/3/0/8/130874518/4840188.pdfIn PDF document text
    • http://kulute.santafecommunityresource.org/uploads/1/3/1/3/131383562/7502225.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/1/0438/3630/9666/files/2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/gekotirosabuwonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/22433193693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/femiwexowakorokoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/kofijukijunex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/bible_verses_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/nbi_online_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/white_zero_turn_mower.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9199/2480/files/nifozidebonakafitoluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/full_ielts_academic_reading_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/79800300633.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_off00006060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6060 5228 bytes
SHA-256: 1f0c1139b9c60de68a59c4c11571b0cf442c50c85a31ca808282183ffbbec673
font_01_sfnt_off00007233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7233 10228 bytes
SHA-256: b9fac1d1f198c509c3d5a9139db35a865faa44ebafb35779638a6691e08f97c8

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