Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd5375287937062…

MALICIOUS

PDF

46.8 KB Created: 2020-08-06 20:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f4dda93f2c95defb0dc5dd585732106f SHA-1: a6d532cddf14965b24386031e75ca7461acee496 SHA-256: dcd5375287937062e56b45d6235928cb097a01f4250e64e1a0a1535f25dc98f8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to appear as a JavaScript tutorial, but the primary link redirects to a known malicious infrastructure at ttraff.ru. This suggests a social engineering tactic to lure users to a malicious site. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, many hosted on Shopify, further supports the SEO-based link farm heuristic.

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=javascript+tutorial+pdf+w3schools In PDF document text
    • http://files.seedsforthejourney.com/uploads/1/3/1/3/131379306/vokijelikurat.pdfIn PDF document text
    • http://files.desmoinesmennonite.org/uploads/1/3/1/8/131857445/bupex-wajadano-jidituminom-lapuzowevor.pdfIn PDF document text
    • http://files.paperrockfork.com/uploads/1/3/1/4/131438397/runejeba.pdfIn PDF document text
    • http://relerixil.juliahamilton.org/uploads/1/3/1/0/131070450/09fbc.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/45484104345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3595/0236/files/nezofajavagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/80323094414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/osrs_1-_99_fishing_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/19016282479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/21614870182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/21435827868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7806/5055/files/pisopujisuruxeworijuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9643/8936/files/75411472765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7372/3811/files/86126258108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/cask_of_amontillado_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5560/2078/files/jojunobujafudo.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_off00006e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E67 5548 bytes
SHA-256: 7db385067f35f46223a17d8f994a71626ae081c1ac1a1cbd4f01ee20d4e92242
font_01_sfnt_off0000815e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815E 14452 bytes
SHA-256: 2ed1c774dbf5966e1adbd8c4eb33831eba1f6884382015db30cefca7efb73ef5

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