Malicious PDF — malware analysis report

Static analysis result for SHA-256 595a26ed818755af…

MALICIOUS

PDF

43.7 KB Created: 2020-08-13 19:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d1c69a3e18e98a3bd5c5d113796f1fe SHA-1: b912ad456b5229e97792e14234242118018e4739 SHA-256: 595a26ed818755af1acaf368d70921360d6032527c48dfe22fd67036c1ca58fc
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.ru'. This suggests the document is designed to lead users to malicious content through a link farm. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact nature of the payload beyond the redirection.

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/wb?keyword=dependency%20graph%20in%20compiler%20design%20pdf In PDF document text
    • http://juzavovu.habamania.com/uploads/1/3/1/1/131164250/nofesoge-fimaxekuzi-kebel.pdfIn PDF document text
    • http://files.dressage.us/uploads/1/3/2/6/132681145/c3da4f8ca8.pdfIn PDF document text
    • http://files.joantenenbaum.com/uploads/1/3/1/8/131871980/0463961cd1451c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7723/6904/files/muxivatenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2887/2359/files/nubopesupuzoromiven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/68847461013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/2126160303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3756/4839/files/rabonopuxumavezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/brazing_vs_welding.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1845/2120/files/4246112685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/64871472166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botolewapaniwid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5509/4677/files/nokeboredudenag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/55151670016.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: cityislandlines.net 6 samples

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4886 5376 bytes
SHA-256: d89d59903be3c38b6d39711a5619c6c500bb9ef38f647ae8a92ae8fbd707a80c
font_01_sfnt_off00005a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9C 9952 bytes
SHA-256: fb6eeee79b9ec474e0982bc5de9862b68fa082f7898df68d808aa5d0154b96b8
font_02_sfnt_off00007cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDA 16484 bytes
SHA-256: 301eb23df72b2b4c0edcba47673bba95b8509d30b76da4b041c09a986d729e2f
font_03_sfnt_off00009348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9348 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3