Malicious PDF — malware analysis report

Static analysis result for SHA-256 79cbfcda78a9f1d2…

MALICIOUS

PDF

38.2 KB Created: 2020-08-02 22:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18f3e04a988e03e5c344d6368c550e28 SHA-1: f7b997d6d1ecf56593ae727a6693151500512e30 SHA-256: 79cbfcda78a9f1d20de0f746b362c0b1f86a366860ecc88cc0d0446395bb1eb5
194 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to redirector infrastructure like 'https://ttraff.ru/pify?keyword=game+bar+presence+writer'. The heuristic firings indicate this is a link farm designed to lead users to malicious content. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, and the ML classifier strongly indicates malicious intent.

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=game+bar+presence+writer In PDF document text
    • http://files.nikiclickit.com/uploads/1/3/1/3/131398573/5298224.pdfIn PDF document text
    • http://files.aratiinternational.com/uploads/1/3/1/4/131453065/tuputisizux_nulixasaleb_zapudid_lowexumogufun.pdfIn PDF document text
    • http://files.shannonecameron.com/uploads/1/3/2/6/132695430/953582.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/1/0433/0412/4580/files/19501593836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/44685496159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6819/3952/files/68630748950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/najumopelikudebuguzekat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5507/0880/files/rebivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/bopujugiraw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/mufub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9171/3443/files/civil_air_patrol_drill_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9695/7343/files/10722095290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0975/3767/files/lorazogolale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2986/4343/files/vovazeditazirokesez.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_off00005831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5831 5312 bytes
SHA-256: 08902f7f9782b5e6f13386a317bac50e14b4256ec55ba6802e02aeacb7b93a58
font_01_sfnt_off00006a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A34 9868 bytes
SHA-256: e4f6693582926b4481c4562455fe8f14baaea5e1bad3acaef7306685f4144c10

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