Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c0c83b0bd90d2f…

MALICIOUS

PDF

37.1 KB Created: 2020-08-19 08:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02a61badfbd3d1d7e06257ed1278934f SHA-1: f225daddf7e82ae26cdb30a585d83c6695062f4a SHA-256: 11c0c83b0bd90d2f868952e9b4865b9b78f5b7a05355e0fe782d6abaa1be5b5b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body and heuristics suggest a lure to download content, likely leading to further malicious activity. The ML classifier strongly indicates 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=business+plan+format+word+document In PDF document text
    • http://files.cornfieldcouture.com/uploads/1/3/0/7/130776110/6416018.pdfIn PDF document text
    • http://files.nationalhorselovers.com/uploads/1/3/1/3/131397987/zigazaluwatuw-lekobisulezegam-fekikumebewu.pdfIn PDF document text
    • http://files.wlcbands.com/uploads/1/3/1/1/131163931/2921846.pdfIn PDF document text
    • http://files.rainbarrelalaska.com/uploads/1/3/1/4/131482941/6206474.pdfIn PDF document text
    • http://files.blackpeakstudio.com/uploads/1/3/0/7/130739718/75690.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/1/0432/6483/5737/files/jcb_3dx_working_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/lutofujijuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9988/1639/files/giwebexuniborijesof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3390/3783/files/lokuwanoruweninelofofiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/42387277172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/vadatigobazafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3548/2529/files/4227400251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/nostra_aetate_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/83260429478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/gotanerupifovirow.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_off00005376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5376 5444 bytes
SHA-256: 34995f6155c26b8dc9255d3b91627df524094a7b034e5e88a938734882715d2a
font_01_sfnt_off000065eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EB 10008 bytes
SHA-256: 17262a640fc5065eaecd3acbe87722639e07fa77118a58139916ceb07e6615ae

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