Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d821464d583dc4…

MALICIOUS

PDF

39.8 KB Created: 2020-08-06 11:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca0a2f2dab43bfe20ad4ca32ed4b1716 SHA-1: 979e593bdabcf653935afb2c2d8eed720d08444d SHA-256: f0d821464d583dc43b8f8032011ece253b8c6e52b430ce604f9873191284c8b6
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'linking verbs worksheet pdf with answers'. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports a malicious intent to redirect users to harmful sites.

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=linking+verbs+worksheet+pdf+with+answers In PDF document text
    • http://gesibex.stephenieayoung.com/uploads/1/3/2/7/132740892/ef0b7af7c7a.pdfIn PDF document text
    • http://files.copelcommunications.com/uploads/1/3/2/6/132695629/sekanufaf.pdfIn PDF document text
    • http://files.signguides.org/uploads/1/3/1/3/131383760/764052.pdfIn PDF document text
    • http://files.bradleylloydteach.info/uploads/1/3/0/7/130739351/1308313.pdfIn PDF document text
    • http://files.bodtkergolftour.com/uploads/1/3/1/4/131407406/2647409.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/1/0430/7173/3917/files/silamuduxaxug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/accounting_warren_reeve_duchac_24th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/5110/2887/files/nxstage_system_one_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/4873285439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2493/3287/files/90302244283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0433/6040/files/32098125262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2920/8986/files/62737152116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/53549802955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/429855865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/kasod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2033782386.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_off00005c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1B 5568 bytes
SHA-256: b18b8b54ab2e1c20890f2180e23535214956043ae3fbef3f41c3d4ba8b5075dc
font_01_sfnt_off00006f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F20 10136 bytes
SHA-256: d108328ec2ea96952ec9b7718996aebb628fb19ef1792f5710aa8c66de992afc

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