Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf12219ee156f64a…

MALICIOUS

PDF

38.6 KB Created: 2020-07-30 04:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1db7c369c1091e0ebf18aa6b852dcf62 SHA-1: 212c9d72d4806e427c9fbca5518ae499011fa53e SHA-256: cf12219ee156f64a001447d2db1b2734ad3275757f1bd7f8ce876a4698422b8d
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a textbook download, reinforcing the lure. The ML classifier also strongly indicated maliciousness.

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=burket+s+oral+medicine+10th+edition+pdf+free+download In PDF document text
    • http://files.trilliumwildedibles.com/uploads/1/3/1/3/131380759/pugotefagewa.pdfIn PDF document text
    • http://files.maxeyshouse.com/uploads/1/3/2/6/132681713/9099627.pdfIn PDF document text
    • http://files.martagonzalezaregall.com/uploads/1/3/1/3/131378899/vitofuxe.pdfIn PDF document text
    • http://files.havenswood.org/uploads/1/3/0/7/130739173/b0a89a15702.pdfIn PDF document text
    • http://files.ottawarotarycalendar.com/uploads/1/3/0/8/130874582/wiwisugi_jolepasuxexojiv.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/1/0428/3134/7868/files/tinegonamimunuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3885/0724/files/mobesijedavogenixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2201/4871/files/xatuxubusagitosajudeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/23645740131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/53823963105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/nufedapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8581/4173/files/gejonurijudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8366/1461/files/jolatuwexesigozuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4586/9985/files/47836643264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4000/6559/files/lejenogazatovesuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/jazixukejiluvupusasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/41961769489.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_off0000582d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x582D 5676 bytes
SHA-256: a86b3170719ab1f3d32379c281f7ca857b56488ae5507189b761833d84ecbc26
font_01_sfnt_off00006b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B69 9816 bytes
SHA-256: 026a1884dd098f27c8f4f775af031cef83ed8092ed8ba31e0b241173fe6a0e46

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