Malicious PDF — malware analysis report

Static analysis result for SHA-256 640f4aede34064d0…

MALICIOUS

PDF

43.0 KB Created: 2020-08-23 07:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b73dece6d5790d6485ff5022292d4ed1 SHA-1: 3b89770f0604c8f4b1b29a795871d39871445a07 SHA-256: 640f4aede34064d0bda4e98c9c14767ede165c2dfa21668b7282ea5a6b07ed57
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains multiple heuristics indicating malicious redirection and link farming. The document body and embedded URLs point to a redirector service, 'ttraff.com', which is associated with malicious activity. The presence of numerous links, including one to a file named 'cain_abel_password_sniffer.pdf', suggests a phishing or social engineering attempt to trick users into visiting potentially harmful sites.

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.com/pify?keyword=cyber+bullying+article+pdf In PDF document text
    • http://files.rarebreednationllc.org/uploads/1/3/0/7/130738619/nagunogik_molosev_nakepadutoza_jajaludot.pdfIn PDF document text
    • http://files.starwheelprinters.org/uploads/1/3/1/4/131453188/4b3f2b6480d.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/1/0463/0505/0784/files/cain_abel_password_sniffer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/craftsman_radial_arm_saw_recall.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6412/9696/files/suvukifilamofose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/43795953386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/pdf_book_marketing_management_philip_kotler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5070/2750/files/robawonoderonipezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25696514874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/18885605494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/81191097021.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_off00006c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2D 5292 bytes
SHA-256: 0f0236868cf426497388b9b0296f6efb2d16168a96a91e86c5712bb7364b1300
font_01_sfnt_off00007e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3E 9900 bytes
SHA-256: bb0347966fa8528aab701f4ad86771d51aaf4bb1dccef0a797837efeda693da2

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