Malicious PDF — malware analysis report

Static analysis result for SHA-256 21a54ab4ccfcc2b5…

MALICIOUS

PDF

63.1 KB Created: 2020-08-20 20:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9dab64b1ce0dcd605a983fb13e856eb9 SHA-1: d1389265ef5254a2bf34af5d2e718bb55c2a0c65 SHA-256: 21a54ab4ccfcc2b583f6d7f55f01ca50857319d5e554a665d9d523122432b0fe
194 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL and a keyword suggesting a lure. The presence of numerous other PDF links, many pointing to benign Shopify domains, indicates a potential link farm or SEO manipulation tactic to increase visibility. No scripts were extracted, but the primary malicious activity appears to be redirecting users to harmful content.

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=cross+platform+games+android+ios In PDF document text
    • http://files.canningcomputerrepairs.com.au/uploads/1/3/2/6/132695719/penutoxanego_biwipu_zafumipojukevem_vililipegul.pdfIn PDF document text
    • http://gepid.wylieeastsoftball.com/uploads/1/3/1/4/131438437/85411bac0bb.pdfIn PDF document text
    • http://files.trainingaid.co.uk/uploads/1/3/0/7/130776276/vimesi_lobewagomuguwa_gubejizepul_rederijutewixab.pdfIn PDF document text
    • http://sabijafi.alittlepeaceayurveda.com/uploads/1/3/0/7/130775388/4741573.pdfIn PDF document text
    • http://files.geraldinepilgrim.com/uploads/1/3/2/8/132815346/6780435.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/1/0438/2598/7734/files/ford_tractor_parts_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/14732757955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/27284160731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/24149954007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15906675896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4149/6986/files/55383610493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1820/6887/files/essential_organic_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1426/2682/files/86109256203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/nakopixojaxoveduvasera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3196/0469/files/seirawan_winning_chess_strategies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/5092647604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/28874400613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/ravi_zacharias_sermons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5420/3031/files/abcam_western_blot_protocol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/12217094902.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB201 5268 bytes
SHA-256: 8a6d7f4c3146b4080a0d61a263ce5abe89acfaf12580658171bbc6913c7b054e
font_01_sfnt_off0000c3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D3 13600 bytes
SHA-256: bdbce71dbbcb5f5f07a3c90a7437f2b3ea1e8426916c446b10989f24b33a9d7c