Malicious PDF — malware analysis report

Static analysis result for SHA-256 513f704fd4e84636…

MALICIOUS

PDF

41.6 KB Created: 2020-08-24 00:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 296f3f54b03dbf41612a68f90fcea508 SHA-1: 3f7d6b5ef2d871b836f79bb83c0678414f8fb3b2 SHA-256: 513f704fd4e84636af9467942596d77fa0aaa8068f4f5ff7ffed15ac0a71251a
202 Risk Score

Malware Insights

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

The PDF file contains embedded links, with one specifically pointing to a known malicious redirector. The document body and heuristics suggest a lure, presenting itself as a 'Kolhan university part 2 mark sheet' to entice users to click the malicious link. The presence of a link farm further supports the malicious intent of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=kolhan+university+part+2+mark+sheet In PDF document text
    • http://files.rfmconstructionkilkenny.com/uploads/1/3/0/7/130740496/sesalubej.pdfIn PDF document text
    • http://jenik.wellesleytn.com/uploads/1/3/2/8/132816117/bugodixejexaw_fosowujoviv_weriwo_dazaforowazabuk.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/1/0430/5082/7929/files/famojidadodeluroruvigon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4641/2188/files/bejumewajoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1566/6849/files/98728377909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/christian_passover_haggadah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4940/9950/files/sprinkler_irrigation_types.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/wodemokozibemog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4854/2109/files/jitesoxudusuruzadovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2145/8853/files/mavumuwuwotedukawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevegijetowid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/l_acidit_titrable_du_lait.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2097/4242/files/52137238301.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 2

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_off00006577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6577 5384 bytes
SHA-256: a587ced776948298970f32df56db893ef6b5bd77197aab27404d852a6f09e3be
font_01_sfnt_off000077a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A2 9920 bytes
SHA-256: bfadac6854595b4886d1d65761e5f469dc487e51c0ea33c35a12d06a5cf8d17d

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