Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b41a13e925bb45d…

MALICIOUS

PDF

40.5 KB Created: 2020-08-08 10:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c622e1b35c139e333bf77330b8202375 SHA-1: 859cc088cb4acaffd929aebb8f40f58885bda96d SHA-256: 4b41a13e925bb45d5f3457a79154ed3b20307485ae1cc622157e78da35950838
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, which is a common lure for phishing or malware delivery. The document body and embedded links suggest an attempt to trick the user into downloading further content. The primary malicious URL identified is ttraff.ru, which redirects to a search query related to converting Kindle to PDF.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=convert+kindle+to+pdf+windows In PDF document text
    • http://files.elder-well.net/uploads/1/3/2/8/132814022/3c15dc1c8.pdfIn PDF document text
    • http://dinis.hulstproperties.com/uploads/1/3/0/7/130776031/5797278.pdfIn PDF document text
    • http://toligevin.darkhorsegolf.com/uploads/1/3/1/6/131606260/kixog-vafax-zevipizer-tedemetusewetuk.pdfIn PDF document text
    • http://zilis.hearttoheartministry.ca/uploads/1/3/1/6/131607095/bebijugozo-womugolotafup-baxoxowasunon-jimarolewiboka.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/1/0437/5173/5448/files/gilimovabaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8724/0095/files/99792836926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1363/5226/files/health_occupations_aptitude_examination.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/xazebewakabuzizokelotifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/82660134034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/pufuzed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/16560504650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3042/9346/files/matlab_conv_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/42802115973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1816/2074/files/analytical_chemistry_mcqs_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/pisusofijewefitet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/4729434684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2781/4805/files/walmart_donation_request_form.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000604a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604A 4948 bytes
SHA-256: 2c305e2685fec01788d87fd0a53503863567b71dd8644ce86431bd87b40a5e9b
font_01_sfnt_off00007148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7148 10488 bytes
SHA-256: 751e8c0b54baea13018c0633310165e3f4b04e3d4a217688d6db7eece8e37174