Malicious PDF — malware analysis report

Static analysis result for SHA-256 6651b71020ecc39f…

MALICIOUS

PDF

44.7 KB Created: 2020-08-09 09:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c36ab673f3cd8e752111ed468ae5f1af SHA-1: eafe5619fa8784ef40ebe3b151cca9365df40676 SHA-256: 6651b71020ecc39f858424f8068c0963b0c6c5a2d41697919f4cee0da9f38dae
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple critical heuristics as malicious, specifically for linking to known malicious redirector infrastructure. The embedded links, including the primary one to 'ttraff.ru', suggest a phishing or SEO-based link farm attack. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the primary malicious URL, reinforcing the attack pattern.

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=my+goal+in+life+essay+pdf In PDF document text
    • http://files.shoprainbowsofhealing.com/uploads/1/3/0/8/130813427/cc347.pdfIn PDF document text
    • http://jupisetet.chemtutorsg.com/uploads/1/3/1/6/131637814/dezasides.pdfIn PDF document text
    • http://files.outsideinstables.com/uploads/1/3/1/4/131406274/8451679.pdfIn PDF document text
    • http://files.hopkinsseniorparty.com/uploads/1/3/0/8/130813514/4785117.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/1/0437/9059/8305/files/91553053331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8524/1256/files/pojabifiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/wujelev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/drdo_ceptam_chemistry_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/define_adverb_with_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/62667944295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2908/6876/files/dazepoxomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/21903691960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3782/4926/files/definitions_of_language_by_different_linguists.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5887/8872/files/bls_provider_manual_2020_free_aha.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0349/9928/files/bernarr_macfadden_vitality_supreme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3156/8290/files/jekikelasarogipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/xerosevebuvotup.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 3

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_off00007086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7086 5220 bytes
SHA-256: 3644f613cf623f0d49260cf7bc67ffac1cbf390a77b2e78817116c7a8d975ac1
font_01_sfnt_off0000827e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827E 10288 bytes
SHA-256: 77c1ccc1fd3c0235b8db04fc64cf18062a2e088120533fab644963095060c802

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