Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f979379b0298c2…

MALICIOUS

PDF

41.6 KB Created: 2020-08-10 12:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f5981aa7855312eb5f07fabde3ef621f SHA-1: 58f6e1fd44bb7fc6e2288e75e4838e6ff24eee02 SHA-256: 66f979379b0298c264bca7066bb5e5ca5deb57d61d8ff41449ce69d484f74b2f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, including one to a known malicious redirector at `ttraff.ru`. The document body, though heavily obfuscated, appears to contain text related to 'hemifacial spasm treatment pdf', suggesting a lure to disguise malicious intent. The presence of a link farm and a redirector indicates an attempt to lead users to potentially harmful content or malware downloads.

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=hemifacial+spasm+treatment+pdf In PDF document text
    • http://files.pillowstudios.com/uploads/1/3/1/4/131407351/noluzewimoxi_kurumonab_kexovajef_vapeduzixa.pdfIn PDF document text
    • http://files.rayconant.com/uploads/1/3/2/6/132682204/034ee7.pdfIn PDF document text
    • http://files.officevalue.net/uploads/1/3/0/7/130739919/riratugutemuze.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/1/0428/2833/3219/files/64825002389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2869/8520/files/police_academy_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/tubutivaxemaluvajenidomaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7962/3071/files/65267756756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0536/9768/files/dubitetakonum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4388/9052/files/catalogo_avon_17.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/wujumedefipituta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2669/4822/files/99756497893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7763/1126/files/traduction_fichier_anglais_vers_francais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9868/6119/files/cooling_tower_design_basics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/16935952428.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_off000063ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63ED 5260 bytes
SHA-256: 9aed50aad6d00eced0b3223b060af54d6c357af323da40f543da57240a22aae4
font_01_sfnt_off000075b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B3 10548 bytes
SHA-256: 218ecad26096adae76c1b1c33e33f79348fb558eebd8a58ebc8f441eaa35f514

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