Malicious PDF — malware analysis report

Static analysis result for SHA-256 0525356b4e5a6169…

MALICIOUS

PDF

41.2 KB Created: 2020-07-30 13:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99bdbf2d4d857b53085d7b04ae582588 SHA-1: 10dbe5f631eb53e70e100c72b52c82cf7ab80ae1 SHA-256: 0525356b4e5a61695909e45fd3d0e7fdeb5e615d756ee8a11a7aecd735f128cb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous links designed to appear as legitimate resources, but a critical heuristic identified them as part of a malicious redirector infrastructure. The primary URL, 'https://ttraff.ru/pify?keyword=kamus+kontemporer+arab+indonesia+pdf', is flagged as a malicious redirector, likely leading to a phishing or malware download site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of multiple external PDF links, many pointing to benign Shopify domains but some to unknown or malicious ones, indicates an attempt to create a link farm for SEO manipulation or to distribute further malicious 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.ru/pify?keyword=kamus+kontemporer+arab+indonesia+pdf In PDF document text
    • http://files.annettebarkerministries.com/uploads/1/3/0/9/130969639/6319214.pdfIn PDF document text
    • http://files.joannaberesford.com/uploads/1/3/1/3/131398475/9500554.pdfIn PDF document text
    • http://files.sos-socialmedia.com/uploads/1/3/2/6/132681307/xetazelevepufewofata.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/1/0440/3567/0166/files/71668306702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/bijirezufared.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1452/0995/files/punosedukazenapezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/kifazarubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9363/8816/files/dedibaken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9511/2347/files/75636537749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9144/3364/files/pijukosukifobuvebovolaxok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/46481984154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3583/6068/files/gepulebofurunuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5363/8044/files/medim.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 4

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_off000062f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F8 5212 bytes
SHA-256: a151fc30bb085b4b1e0616d1704c462b3670bf43d80cf38839a1ffbe2bc6e9d1
font_01_sfnt_off0000748d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748D 10492 bytes
SHA-256: 3126017c866882e887a2f28775ee610c151fdea77a9a85c4d2255b6bf883cf11

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