Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42417565d967e75…

MALICIOUS

PDF

39.1 KB Created: 2020-07-23 22:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cc5c2ba6a92fddd95f5889841e7d6671 SHA-1: 4abc66562216ac67a96c19a7982bc369407f7ada SHA-256: a42417565d967e75358dd33fd77e7b9111efbb9a9e14bec91de11163c6ebc987
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF SEO link farm heuristic, with numerous links to Shopify-hosted PDFs, suggesting a coordinated effort to lure victims. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a malicious link embedded within the document.

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.ru/pify?keyword=present+simple+present+continuous+exercises+pdf+beginners In PDF document text
    • http://files.tbrms.com/uploads/1/3/1/4/131409884/muwomuzo.pdfIn PDF document text
    • http://files.lifeunshattered.com/uploads/1/3/0/8/130814056/rigifap-juzimokubivo.pdfIn PDF document text
    • http://files.moraira-holidayvillas.com/uploads/1/3/0/7/130738823/xanapisutuwu.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/vexib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/99923340171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0928/6050/files/dutimolepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/sakuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/pedimejimirepixax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/31952900720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8579/1383/files/35752473970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/7904117193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7821/1991/files/watakibalene.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 3

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_off00005c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C23 5356 bytes
SHA-256: 200a76adb45c531a03ce2c918f5af45031cadf020b04850522c7cfcb3680b4cc
font_01_sfnt_off00006e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E37 9612 bytes
SHA-256: 5f6fea68df8e0b05383e58b99f225654671bff87a84da9256c23e4c62ed6f5e9

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