Malicious PDF — malware analysis report

Static analysis result for SHA-256 81c587a352282ce7…

MALICIOUS

PDF

41.7 KB Created: 2020-08-08 23:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a8672627edbf213261e3b13e85d9b8a SHA-1: 632b81b4de75768fc5dd00ac0106e59f49a6c894 SHA-256: 81c587a352282ce7d5c36357e026e8e024d4c7a23ba5772e91f845bef3fbef76
234 Risk Score

Malware Insights

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

The PDF contains numerous links to redirector domains, including 'ttraff.com', which is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a specific book title, suggesting a phishing or malware distribution attempt. The presence of multiple PDF links and a malicious redirector indicates a coordinated effort to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=evi+nemeth+linux+administration+handbook+pdf In PDF document text
    • http://files.murrietajunkremoval.com/uploads/1/3/0/7/130774990/fiwikedukofej.pdfIn PDF document text
    • http://files.northernriversbathroomrenovations.com.au/uploads/1/3/0/8/130873995/tebuweref.pdfIn PDF document text
    • http://files.energyworx2.co.uk/uploads/1/3/1/3/131398097/gijuwemoxapuw-pileduseja-dejoleve.pdfIn PDF document text
    • http://files.newmillerdam.info/uploads/1/3/2/7/132740250/dilisamumoneti.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/1/0427/7154/6279/files/13275716301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/ffxiv_easiest_dps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/kawuzur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/fukobimanog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6327/0815/files/tepagebafonajerasosut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/49677868912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/herbalism_guide_vanilla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/vimop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/theory_of_bergman_spaces.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_off00006294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6294 5568 bytes
SHA-256: 9f921560f28e5572f832f74030f933cbbef7f0b1ebf71acaf134198dadf6eeb3
font_01_sfnt_off0000755d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x755D 10736 bytes
SHA-256: 97185625179b2462e3249d9c2925ca14140e4762a4b03540fc3a67c0f102a609

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