Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b36fb841c5bd06…

MALICIOUS

PDF

41.3 KB Created: 2020-08-19 09:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: afa388bd07a2716a9de912bec5bb17db SHA-1: 66facba11d39df04cd5ffdf4be541d4bfa5af877 SHA-256: a0b36fb841c5bd06d3aae89035e5ed290eab5a022abace5fac31d705a803e4b9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. This URL is presented to the user as a search result for "acls algorithm 2019 pdf", indicating a lure to trick users into clicking. The document also contains a large number of embedded links to external PDFs, many hosted on shopify.com, which is flagged as a link farm. The ML classifier also strongly indicated maliciousness.

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=acls+algorithm+2019+pdf In PDF document text
    • http://pegenevep.paulmetcalf.net/uploads/1/3/0/8/130873715/4dbacb4ea8.pdfIn PDF document text
    • http://files.how2productions.co.uk/uploads/1/3/1/0/131070581/rosurojamatubil.pdfIn PDF document text
    • http://metamokig.branchboutique.net/uploads/1/3/2/3/132303189/f7994a93228f7.pdfIn PDF document text
    • http://takadages.allstarclean.org/uploads/1/3/2/8/132814900/suwagovemuw.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/1/0434/7278/1478/files/infant_daily_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5950/3519/files/zogipulefonisulofaluk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2331/6630/files/adobe_premiere_pro_cs4_tutorial_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8391/4654/files/burnout_paradise_mobile_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/sapukejenodezevugotonuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45251784546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/fitted_bed_sheet_sizes_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/jelefaxapafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/lepalifujadafiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/world_of_warcraft_rpg_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1315/8565/files/82488372939.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 3

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_off00005f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0E 6040 bytes
SHA-256: 411701ff3cea6dd6caee934dd609fda9a8c106c2b20d45ac48ef5df327fe6383
font_01_sfnt_off00007374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7374 10936 bytes
SHA-256: df5e0b447d0299f3c720bd3fe758b7d4fbd69e9fea845fd87bf01f1b812b3486

Open this report in the interactive analyzer, or submit your own file for analysis.