Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b31d96728b9214d…

MALICIOUS

PDF

46.7 KB Created: 2020-08-07 00:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4fdb477bceae5913bbbdb1b953713158 SHA-1: a8b517c1d79e07c23f88049061ec934c10300b7b SHA-256: 3b31d96728b9214d71296f78dc59cd68a88da43688807d003c5eedab36431ee5
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, forming a link farm. One of the primary links directs to a known malicious redirector at 'https://ttraff.ru/pify?keyword=posthuman+board+game+rules+pdf'. This suggests the document is designed to lead users to malicious sites under the guise of providing game rules. No scripts were extracted, and the document body was heavily obfuscated.

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=posthuman+board+game+rules+pdf In PDF document text
    • http://files.littleegyptlyceum.com/uploads/1/3/1/3/131380627/29fde3e09.pdfIn PDF document text
    • http://files.powtronicstech.com/uploads/1/3/1/1/131163691/jelusinav-sifuvure-sefeweluk.pdfIn PDF document text
    • http://files.elizabethrona.com/uploads/1/3/0/7/130739918/dosilupafulevajidew.pdfIn PDF document text
    • http://files.wyalusing.net/uploads/1/3/1/8/131871466/2d493ea145e.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/1/0429/9191/1066/files/the_broken_wings_kahlil_gibran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/xajog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/tipamukutipujozeroles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4570/0262/files/jowomarekasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1353/7951/files/13362664935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4116/8283/files/budanivamomip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0880/2466/files/70643522345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6762/8950/files/86176808108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0433/8074/files/briggs_and_stratton_5500_watt_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/pmp_exam_prep_questions_answers_explanations.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_off000078d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D4 5596 bytes
SHA-256: 5639c3aefc1b75611be695f4ad502bd4b39b7b04f530758254ca7f7db456497c
font_01_sfnt_off00008ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA7 9916 bytes
SHA-256: 5b4a929f000b80a4462d47ff0dfcab9006e31f4274872c08d91c327605b2c9a2

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