Malicious PDF — malware analysis report

Static analysis result for SHA-256 962fab43fc728c37…

MALICIOUS

PDF

44.8 KB Created: 2020-08-05 01:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6de4f6571dc4254c0c51c2ba26d86f5f SHA-1: 608a20af7f2542580b4605754ba10776c4c7eaaa SHA-256: 962fab43fc728c37b49397bc8432800a76bfbfaa947e56c32e49f1856eb122a5
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector. The primary malicious link, https://ttraff.com/pify?keyword=respiratory+system+parts+and+functions+worksheet+pdf, is designed to lure the user into clicking it by appearing to be a worksheet. This link then redirects to further infrastructure, indicating a phishing or malware delivery attempt.

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=respiratory+system+parts+and+functions+worksheet+pdf In PDF document text
    • http://files.mississippimudkennels.com/uploads/1/3/1/4/131410747/b60a8a.pdfIn PDF document text
    • http://files.wordrefiner.com/uploads/1/3/0/7/130775912/pukawujo.pdfIn PDF document text
    • http://files.saturdayandsundayonsignal.com/uploads/1/3/0/7/130739906/4230024.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/1/0429/6127/2988/files/nibodilixoxalifum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8125/2508/files/wokuravunavipuwodijijof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/dibarerenufevevavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/burner_management_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/pawerujonavuzizup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/guwukokoneboxut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/75924300563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0438/5686/files/30612443025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/12231874838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9635/6504/files/70662966804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/duwibigawajiledux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/5436219540.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 6

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_off000071be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BE 5628 bytes
SHA-256: ba2130514e905898d49890cab525d0157af36ac2cbfd7a8398e04a1039ca46c9
font_01_sfnt_off000084da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DA 9756 bytes
SHA-256: 64ca09cc2c6b53ef540d161fafb4c091acab7cda642257cac2ac0040ea91dd83

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