Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde1644ac5e44022…

MALICIOUS

PDF

31.8 KB Created: 2020-09-10 00:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8008c005a6cf88bf6a723177485305ca SHA-1: 47456a9045a95dfce44d7ba61a1616179abc7e97 SHA-256: fde1644ac5e44022d2142e3206c66818471f4cb58d36ce72156b97152cad977f
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm. One critical heuristic identified a PDF redirector link to 'ttraff.club', which is known malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a link farm and a malicious redirector indicates the document's purpose is to lead users to potentially 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.club/pify?keyword=metal+texture+cinema+4d In PDF document text
    • http://files.prestigesis.com/uploads/1/3/1/4/131408970/427911.pdfIn PDF document text
    • http://files.kirylkhalmetski.com/uploads/1/3/0/7/130775462/vuzajijudemurek-gosudopebugefes-marivegabon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/21e6f2_951f04cbca1a49c5b114580476afa668.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6f9b04_fc4696e0cdb04094bc08badf5c0f91d5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/01bc73_075013367cb34d3eab2966379773d0c9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ed64d2_c2c3b38a40ec41a6925a2d768d13bbab.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a59130_edfee1da9dae4c1b9d0b897171a4a8b5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/boxex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8947/5237/files/67334822194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/zotudovuzejizikimo.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 1

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_off0000408d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x408D 5068 bytes
SHA-256: ef010be397ad32c758720e1da7f7ca82a2d3384ceadc06a3b24582a736dbac55
font_01_sfnt_off000051c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51C8 9712 bytes
SHA-256: bdb65782293dc009347ec9a377f5ac45a2d818f918133a2531c55af5d422a931

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