Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca6d55e30735ac6…

MALICIOUS

PDF

42.9 KB Created: 2020-08-12 19:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4381c47d22f8d9a144d5e1832e1c8d31 SHA-1: c88218b68cb3faee2ae156ac438fa18e849e01df SHA-256: dca6d55e30735ac687a70fcdc0e97387b869622e44f56b1832d07832a6b8a5c4
194 Risk Score

Malware Insights

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

The PDF contains a deceptive lure, presenting itself as a free download for a medical textbook. It embeds numerous links, including a primary redirector to `https://ttraff.com/pify?keyword=hematology+basic+principles+and+practice+7th+edition+pdf+free+download`, which is flagged as malicious. The document's structure and embedded links indicate a phishing or malware distribution attempt disguised as a content-sharing site.

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=hematology+basic+principles+and+practice+7th+edition+pdf+free+download In PDF document text
    • http://kepelesel.perfectpelvicfloor.com/uploads/1/3/0/7/130776485/8818247.pdfIn PDF document text
    • http://najodiv.altheadesigns.com/uploads/1/3/0/8/130814921/620726.pdfIn PDF document text
    • http://files.artarmonphysiotherapy.com.au/uploads/1/3/2/7/132740694/nomojiwixop.pdfIn PDF document text
    • http://files.afmsupplements.com/uploads/1/3/2/3/132302815/972851.pdfIn PDF document text
    • http://pexik.mystrugglemyvictory.com/uploads/1/3/1/4/131438541/92fd32496a8e7dc.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/1/0432/1997/6350/files/kowunuvedugudananetobona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2574/4540/files/arabya_rajani_comics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/jexedikedokekelezotigasav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/23628682583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/85729348754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/rabubivozudikinowegikuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9685/1103/files/tusolasexaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/vojepemofeberafetitalot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/nidusipakowug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/19917799787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/51036693391.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_off000066c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C7 5944 bytes
SHA-256: 4f7e34400e2681d396145e4da6320f3584fbf5fab536a88d4cf25a7656ecc9b7
font_01_sfnt_off00007aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AED 10284 bytes
SHA-256: 0302bad0184101825b2244fbbbcdd0eba929a5e6d62c9524f88016448db73948

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