Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0cafe0950a2ad8…

MALICIOUS

PDF

67.8 KB Created: 2020-08-23 19:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d7681cf1ae8bdbf109d0b7b712a0807f SHA-1: 72aa7d20729d6e00ae578ee0e98246c5d9a7bdd6 SHA-256: 0c0cafe0950a2ad86f685241dfd523f9eb3dfae742eca472ffe7f1dd3e0cb58d
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and link farming, specifically pointing to a redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure for users to download a report. The ML classifier strongly supports the malicious verdict.

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=hester+biosciences+ltd+annual+report In PDF document text
    • http://files.katrinarecoveryquilts.org/uploads/1/3/2/6/132681758/9465931.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/42314816775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/tijoxixanezogotuxunaved.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/75401619422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8105/6931/files/87793366872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0345/9230/files/70869134174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/xaxojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/basic_networking_concepts_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/world_oceans_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/vakokezuwafuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6904/6935/files/shark_canister_vacuum_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/background_music_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3314/1149/files/schwing_stetter_batching_plant_m1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D4 5048 bytes
SHA-256: 2eeab9a8597b05a2c5965aa743f7c97cc676a92bd168ce6269ba81ebd9154b13
font_01_sfnt_off0000c4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F1 15288 bytes
SHA-256: 246b5c5cd0e99a36960dec797dfc25241a4bfa6d522f1792aebaa8c006d0fa09
font_02_sfnt_off0000f3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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