Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d79e960d9c4640…

MALICIOUS

PDF

44.0 KB Created: 2020-08-04 18:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0a9a8f6b0180562925d654efbe9517ce SHA-1: 6c3876f5161e0aaccf096c0483e14af78b4de7b0 SHA-256: 88d79e960d9c46407fec933cafaf79e2724337daff47db8083e639d79fcdcc57
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body and heuristics suggest a "link farm" or SEO-based lure, likely intended to trick users into downloading further malicious content or visiting phishing sites. The ML classifier strongly supports the malicious verdict.

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=abnormal+lung+sounds+pdf In PDF document text
    • http://files.67writer.com/uploads/1/3/0/8/130874205/panodenire_ludazeveme_kuberi_gitakex.pdfIn PDF document text
    • http://files.psstrings.com/uploads/1/3/0/7/130774977/4e305056f1dcd.pdfIn PDF document text
    • http://files.elizabethkelleylaw.com/uploads/1/3/2/8/132814123/3113470.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/1/0435/5116/2517/files/lowes_port_orange.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96617946950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/1457/3467/files/encyclopdie_marvel_universe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruxejuvekega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/kuvilanewajadunuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0165/1101/files/10007082967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/pobesurizovasuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7900/7384/files/invertebrate_zoology_barnes_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6577/0133/files/rapatuwokiseguzoxaredited.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4277/4938/files/xalekukegukurizuxijebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8572/5857/files/61140239698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6987/4082/files/xovuxedi.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 4

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_off00006dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD9 5492 bytes
SHA-256: 744286645bc4e714111b552b79aab378ab09b1781e71765ba3cc0572e42f304c
font_01_sfnt_off00008066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8066 10100 bytes
SHA-256: 049f8aff7fef88b035b01b3fa8f6b04bb384eb4abafb39bd7f1beba0d223dcc3

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