Malicious PDF — malware analysis report

Static analysis result for SHA-256 729745dfae2ec40e…

MALICIOUS

PDF

43.4 KB Created: 2020-08-11 16:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 24b9c58391a72379b9847468652116f9 SHA-1: 29d45bb2a02ddc2dfb4b8c2b43534cc92215a77a SHA-256: 729745dfae2ec40ef49b26e1b7e50b3c0f0726bbaf6b486fa86ecf226286afa7
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) disguised as a free download lure. The ML classifier and heuristics strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

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/wb?keyword=organic%20fertilizer%20vs%20chemical%20fertilizer%20pdf In PDF document text
    • http://revoxulin.southwestconferencescores.com/uploads/1/3/1/3/131380005/bozazomis.pdfIn PDF document text
    • http://files.vanvalkenburgbuilders.com/uploads/1/3/0/8/130813111/3204594.pdfIn PDF document text
    • http://files.chrisanthicouture.com/uploads/1/3/2/3/132303024/1450266.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/1/0435/4893/4295/files/wexujidixojetero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/rifilalafufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0530/2168/files/student_mark_sheet_in_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/nuzoniwosarigut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9135/9899/files/54641321628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/nepejuwikipexizaxalipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/56551559247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7705/6165/files/97613839013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/gogudozedukinowod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/create_a_branch_terminal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/xefataj.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 1

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_off00006864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6864 5704 bytes
SHA-256: 42f2b5254bf035eac8ca6805e29d9ba2e1cb8c9dc09e867d3968d7eb11c2cff0
font_01_sfnt_off00007bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB1 10864 bytes
SHA-256: f853c6eb00cab29e39fbc1256bf74e6d539c8783650210df0f076bca18d58aea

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