Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fea25723dbc2991…

MALICIOUS

PDF

43.7 KB Created: 2020-08-03 16:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 11a097ff09e8a312670c0c7ffded690c SHA-1: c69331bf6b28a251abe11e75bba617acd7a6bbd0 SHA-256: 6fea25723dbc2991a8f683382079aa86350322b1e4ce0bd41deec231fa01e7ad
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though obfuscated, includes a URL that appears to be part of a link farm or SEO scam, aiming to drive traffic to potentially malicious sites. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a high likelihood of malicious intent.

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=concepto+de+auditoria+administrativa+segun+autores+pdf In PDF document text
    • http://files.durringtontheatricalsociety.com/uploads/1/3/1/1/131163838/fc61992b142.pdfIn PDF document text
    • http://files.thethirtyfirst.org/uploads/1/3/2/3/132302978/fujuxowurabufurigag.pdfIn PDF document text
    • http://files.siliconvalleycoders.org/uploads/1/3/0/7/130738641/d4ce4d181c4.pdfIn PDF document text
    • http://files.amorajstudios.com/uploads/1/3/0/7/130739069/viwak-tikowex.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/1/0438/2454/5949/files/kokefigofisajukaralosid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/nawinep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8173/5073/files/58293991413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/degamineb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/vulitunajolitorir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6018/2692/files/topopometudopobizosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/xuzizakewivij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/4582704034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45484104345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/leliturugilej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/lozafibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0880/3495/files/pukipeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/66043507089.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 6

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_off00006789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6789 5408 bytes
SHA-256: f756f2f74e771b079943c25c4c3c470c479c724ffc4216b77a371d75227dfa36
font_01_sfnt_off000079e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E3 11620 bytes
SHA-256: fefea8fb838a1b2239d6308dee282adc79a80970cfff17d2379b5c31d5c4db98

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