Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef5940c2392fcd6…

MALICIOUS

PDF

33.9 KB Created: 2020-08-07 21:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ca2f797b3ca7a64830a24069ba3f540 SHA-1: 51c87acc059523b7bbcf6d12680d856c798cfa53 SHA-256: bef5940c2392fcd6450f912a247f1dc6946dd3604f3323454570a2f4b6d178bb
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used for SEO link farming or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=basic+civil+engineering+pdf+notes'. The document body, though partially corrupted, contains text suggesting it is a lure for 'basic civil engineering pdf notes', intended to trick users into clicking the malicious link.

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=basic+civil+engineering+pdf+notes In PDF document text
    • http://files.auburnhighfootball.com/uploads/1/3/1/3/131384635/lopokuvudu.pdfIn PDF document text
    • http://files.whereisthebrightline.com/uploads/1/3/0/8/130814774/delewavuvet.pdfIn PDF document text
    • http://files.offenhauslive.com/uploads/1/3/1/8/131856195/tuteg.pdfIn PDF document text
    • http://files.yogaterrium.com/uploads/1/3/1/1/131163943/4709747.pdfIn PDF document text
    • http://files.kofcstarofthesea.com/uploads/1/3/1/3/131379594/dawujatotodusinitif.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/1/0431/5453/8656/files/vw_jetta_transmissions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9401/6157/files/wujas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/xabuzajegabatetewapawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5274/files/gozazulonase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/79706461794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48675385277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8143/1195/files/xisuxutapisakuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/fowezogikafumoganorixakun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0976/9631/files/javascript_compare_array.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4115/2406/files/6445312335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7794/3967/files/journal_quotidien_el_watan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/47376268974.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_off000045d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45D6 5432 bytes
SHA-256: 2d581c889785b37ec613f6a81b3f0b0469dc2ab4c4c2c9282ee78c7264396345
font_01_sfnt_off00005869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5869 9984 bytes
SHA-256: 211eb86cab5bd39d5cf4724bf5dfe0882340bc695062779b62d9fa37db114d84

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