Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b20f977ef0bf47…

MALICIOUS

PDF

45.6 KB Created: 2020-08-02 18:40:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f3ec95de2eb5b0a0edfd91feafefab5d SHA-1: 6d55b6140c72fe92c74f4bcbf405f084d16f2079 SHA-256: a6b20f977ef0bf47642a5f280dc5dd2f169db6ef297bc054e18c70d0f7f1103d
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links. One of these links points to a known malicious redirector, while others form a link farm hosted on Shopify. The document body contains garbled text but also includes the malicious redirector URL and several Shopify URLs, suggesting an attempt to lure users to external content. No scripts were extracted, but the sheer volume of links and the critical heuristic firings indicate a malicious intent, likely for traffic redirection or SEO abuse.

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=akai+xr20+tutorial In PDF document text
    • http://files.euphonymagazine.org/uploads/1/3/2/6/132695569/c60d12f.pdfIn PDF document text
    • http://files.dgassoc.net/uploads/1/3/1/1/131164452/7151466.pdfIn PDF document text
    • http://files.carlisleconcernedcitizens.org/uploads/1/3/1/6/131606490/toviwo.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/1/0430/5901/9927/files/79305905510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5589/6983/files/6272470747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/pamoxitezopikojenunizit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/rasojimubusumapimaxino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/bimawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/15892949291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/fobir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3532/0742/files/for_loop_bash.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2204/0731/files/mudeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/21147180012.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 7

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_off000076bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BF 4896 bytes
SHA-256: db57120be0b57115658b5a4de27feeafd545f37f1c26fa4a56d7c398d04831ca
font_01_sfnt_off0000877c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877C 10100 bytes
SHA-256: dbb831a41f0c18ee531294f6e400dc32c00893d5109465a4b89a0e9a95b041f3

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