Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98c7cfef1a80305…

MALICIOUS

PDF

48.5 KB Created: 2020-08-07 02:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9fc7482db9243975f9625aec9e804511 SHA-1: 5fed1b4297260082bf61aea07d506bf3a3982019 SHA-256: e98c7cfef1a80305398b3aeebaddcf44e941d1a8c1ecb396c02999c530fe0a35
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic. The presence of a link farm heuristic further suggests a malicious intent to drive traffic to external sites, potentially for phishing or malware distribution.

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=vector+tangente+normal+y+binormal+calculo+vectorial+pdf In PDF document text
    • http://files.hengjieai.com/uploads/1/3/0/8/130874457/xusoliva.pdfIn PDF document text
    • http://files.pcpachicago.com/uploads/1/3/1/3/131379761/pokadojuvikopinaji.pdfIn PDF document text
    • http://files.funelteacher.com/uploads/1/3/1/4/131482968/sizuloka_botavefefugoro_fejowelepibide_rajozojamifibig.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/1/0439/8078/3774/files/call_of_duty_waw_zombies_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/letisotezaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5473/4241/files/lomefososakad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3775/3493/files/71646741927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5633/9861/files/rupagumisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2567/0037/files/8483411078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/wezemowoxanimimukofet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9784/1063/files/autocad_objective_type_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/nivata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/tutorial_angularjs_indonesia.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A7 5564 bytes
SHA-256: 2cbbacd6521c2cf455b23e39d5e998c44d592310590858e2e13f6f9d39e94582
font_01_sfnt_off00007990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7990 10520 bytes
SHA-256: f95f9fe4cda9221b6d62630c37fc0bd08e811312ce8a83509cd09e6369d7297e
font_02_sfnt_off00009d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D4A 16108 bytes
SHA-256: b6f255e930c99f47bdae02a5172afc6b20c830d00a176f41f9928999b07a02e3

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