Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a73dc4141f782c…

MALICIOUS

PDF

36.3 KB Created: 2020-08-19 06:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 666ce9362682acda1312317c787bc88a SHA-1: bf693168ef61107282a7bfb59931fe871cf9d304 SHA-256: 73a73dc4141f782c5ad4237a5492782391af5e7ec2365f39b412380991a9b5b8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body and heuristics indicate a lure for free downloads, likely a phishing or scam attempt. The ML classifier strongly supports the malicious verdict.

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=biochemistry+book+pdf+for+dmlt In PDF document text
    • http://files.schnursgreenhouse.com/uploads/1/3/1/4/131453648/gutukexav-zigafopaxo-narobetugefesa-joforiwijevuda.pdfIn PDF document text
    • http://nidimaw.avex360.com/uploads/1/3/1/3/131384021/keguge-joravolivoxena-nujowivitefot-degilazejozuga.pdfIn PDF document text
    • http://files.jgreenartofficial.com/uploads/1/3/1/0/131070450/6b6a0382ce33c05.pdfIn PDF document text
    • http://geposeje.ronslater.com/uploads/1/3/0/7/130775971/vagopedaka.pdfIn PDF document text
    • http://files.aguadulcehistoryproject.com/uploads/1/3/0/8/130815124/8b6988.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/1/0430/6678/5953/files/81705256925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/nanavunafifow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/boss_gt_100_owner_s_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2166/2365/files/zisopikef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/40352191117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/2006_fuel_consumption_guide_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3335/3627/files/30784266960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0493/5835/files/defidago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/wezuxotakokagoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6127/9896/files/487650276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32867625585.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 2

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_off0000504a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x504A 5540 bytes
SHA-256: d494aaa29d10201389ae5ac9a7fb5ab76d64beb9c166d76a19ce31624b21400d
font_01_sfnt_off000062fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FD 9704 bytes
SHA-256: 9d1c29072b83a12dd20fb2df77839c9c9aeb64f90416f232b4e57060c1fa69e8

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