Malicious PDF — malware analysis report

Static analysis result for SHA-256 82fa863a954e2729…

MALICIOUS

PDF

114.9 KB Created: 2020-08-12 07:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b2a42c07fc8557acb1fb70b9daa777b0 SHA-1: 82e71a57accf9ca15b6b2ad51c795738ff74e479 SHA-256: 82fa863a954e272901094c2369026f91249c9ad41b0d08c13a2c17651352f431
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically 'ttraff.ru'. This redirector is used in conjunction with SEO tactics to lure users into clicking on links disguised as free downloads. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links suggests a link farm used for SEO manipulation and potentially distributing further 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.ru/pify?keyword=fisiologi+sistem+pencernaan+manusia+pdf In PDF document text
    • http://files.millermetalarts.com/uploads/1/3/1/4/131411542/6263940.pdfIn PDF document text
    • http://files.agilitydreammaker.com/uploads/1/3/1/8/131857717/fejiliwasipox.pdfIn PDF document text
    • http://files.fcccamp.org/uploads/1/3/1/8/131857315/694c181.pdfIn PDF document text
    • http://files.bagpipelesson.com/uploads/1/3/1/3/131381540/111724.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/25843483079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3264/1689/files/hebrew_aleph_bet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5934/5573/files/tous_les_journaux_algeriens_en.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8276/7779/files/81851422876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1561/8203/files/23780112741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5559/6198/files/tipos_de_aprendizaje_significativo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/family_trust_deed_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8294/8506/files/dasijananusanurasuzuwogez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4319/0946/files/accounting_information_systems_11th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/0670/0183/files/alter_ego_a2_hachette.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/pukazaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/xonilosofoxamekubolalom.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 8

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_off00018290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18290 5432 bytes
SHA-256: bbcbb23cb191e3f2127f870cdd020889a69c0881254c26d528dfd3a7d6eecfee
font_01_sfnt_off000194f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194F3 12980 bytes
SHA-256: aae0a1b673b182c9f28c366dd15df2c75af2332d4482f225ab989eb15b2c7004

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