Malicious PDF — malware analysis report

Static analysis result for SHA-256 a928d9aeb9b99e66…

MALICIOUS

PDF

35.1 KB Created: 2020-08-08 00:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6cfb7ac002c94b8ccfaf99675db63a82 SHA-1: 8de4d853754a4dca535b514ca48a27201878b357 SHA-256: a928d9aeb9b99e66c9ccb226cecc243dcaa0b1855b157cbca34d23ab0ab362ea
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. The primary heuristic indicates a malicious redirector link to 'ttraff.cc', which is likely used to obscure the final malicious destination. The document body, though heavily corrupted, contains text referencing 'pdf file combiner free' and the malicious URL, suggesting a social engineering lure.

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=pdf+file+combiner+free In PDF document text
    • http://files.hollyberrycatering.com/uploads/1/3/2/8/132814261/masukejotum.pdfIn PDF document text
    • http://files.alicelevinemusic.com/uploads/1/3/1/8/131856146/rotujunoz.pdfIn PDF document text
    • http://files.medseamalta.com/uploads/1/3/1/6/131636655/aaed23f828ce.pdfIn PDF document text
    • http://files.mitigationwines.com/uploads/1/3/1/1/131164097/6181346.pdfIn PDF document text
    • http://files.theartisantallitco.com/uploads/1/3/1/4/131455463/gowal.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/1/0433/0687/7080/files/sividejujim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7265/8335/files/widawaseruk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/70293225452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/catch_wrestling_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/upper_airway_obstruction_in_pediatrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9655/6191/files/xutofetavuxulifewijivuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35679391278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/1277276879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/adjectives_describing_character.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/kubunopotofet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/zojewosatudoxiwezak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53295895336.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_off00004cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB3 4920 bytes
SHA-256: 0803d6c9f2169c8f6ab225918f6b566274411ee052d8570ca471eb19cd4f4f97
font_01_sfnt_off00005d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D59 10088 bytes
SHA-256: a918ce57ffa563d0e44f9b46c41adff97584aaa8708cee0496483be17b9ca052

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