Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c25a17f0b4b065…

MALICIOUS

PDF

39.6 KB Created: 2020-08-09 20:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 82301a2bd19c2073eff8618d5d9e1a51 SHA-1: 81ca401e5c7fde5d3dad9e4f2ab3df715af70b66 SHA-256: 23c25a17f0b4b065bf47cef50bca49bfbee0761083531bf3be166c6bb5ac4610
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One of the primary links, 'https://ttraff.ru/pify?keyword=inter+1st+year+text+books+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for educational materials, suggesting a phishing or scam attempt.

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=inter+1st+year+text+books+pdf In PDF document text
    • http://lusukanoj.adambaybutt.com/uploads/1/3/1/6/131637257/7c0d0434.pdfIn PDF document text
    • http://files.chrislilly.tv/uploads/1/3/0/7/130776728/nufopufiso.pdfIn PDF document text
    • http://files.southbridgeboathouse.com/uploads/1/3/2/8/132814468/tivovile-povafipu-pitofikifel.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/1/0431/5276/9192/files/bavugepojope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7303/4657/files/apa_writing_style_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/48288248214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2274/4741/files/34254617931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7806/5059/files/que_es_una_cadena_alimenticia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6653/8649/files/85417794428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4301/0198/files/18725293391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5680/6553/files/big_data_tutorial_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/mazanedemoluvolereni.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 5

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_off00005dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEE 5364 bytes
SHA-256: 4f0c54c98530e653c6fbd9043b3f3b3e3715147c6b1b4ebf750dc92e99fc41db
font_01_sfnt_off0000704c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x704C 9864 bytes
SHA-256: 69594c9b932d67ea342a6924c8a754e3c1256f557ad4ad3266cd59e888dcc34c

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