Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc7df52e3d32fa8c…

MALICIOUS

PDF

36.2 KB Created: 2020-08-08 01:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67cacadcf0d676ddfd91d93b8b0d447d SHA-1: cc06c73b74c725e01d1e5bc1c944df11aee51b91 SHA-256: bc7df52e3d32fa8cee4927de2e1a92a759ceecc02cb22d5db8e344e99ae1f5bf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. This link is presented within the document body, disguised as a student book PDF. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted from this sample.

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.cc/pify?keyword=cutting+edge+advanced+student+book+pdf In PDF document text
    • http://files.greatwhiteadventures.com/uploads/1/3/0/7/130775590/7215655.pdfIn PDF document text
    • http://files.architect-mostafa.com/uploads/1/3/2/6/132695294/xewumobeg.pdfIn PDF document text
    • http://gidafab.cccoalitionac.org/uploads/1/3/1/4/131438464/gumotenapaz-barujagin-madulej.pdfIn PDF document text
    • http://files.amberstudy.com/uploads/1/3/0/9/130969695/711241.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/1/0432/2381/0211/files/20820959697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3712/1951/files/arduino_sensor_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2121/7442/files/free_celta_course_materials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/vozodinogofipisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/84283339224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/22875191777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/pikiviwirukek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/map_of_the_world_blank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/rental_agreement_contract.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/imperative_programming_bsc_it_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/96113321590.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 4

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_off00004c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C5F 5364 bytes
SHA-256: d84c18ee1668deceb73c1810d524907b3b3ded9356419971c4f4e7b5e66ecf7c
font_01_sfnt_off00005ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBF 11504 bytes
SHA-256: a8bde8a5610641a724e46275f489b00b19f6edf1586998fa997cccdf416e3d52

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