Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b2860259d32761b…

MALICIOUS

PDF

83.2 KB Created: 2020-07-29 21:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c99c8fd0d6983adbdf4dbbc92d42aa24 SHA-1: b042a35b48827912547a556a7c7961073118035c SHA-256: 8b2860259d32761bb5b86826eab84b37868933314694a3213b207a1166c3b9b8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This, combined with a high ML classifier score and a heuristic indicating a PDF link farm, strongly suggests a malicious intent. The document body, though heavily obfuscated, contains text related to 'Acute gastroenteritis treatment pdf', likely a lure to disguise the malicious links. The primary attack pattern involves redirecting the user to a potentially harmful site.

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=acute+gastroenteritis+treatment+pdf In PDF document text
    • http://files.brettjonesportfolio.com/uploads/1/3/2/3/132302970/fijimabuwatifubemuv.pdfIn PDF document text
    • http://files.ancientsonespeak.com/uploads/1/3/0/8/130813855/mekivamonipeb.pdfIn PDF document text
    • http://files.corralesconstructionllc.com/uploads/1/3/1/8/131871618/doruned.pdfIn PDF document text
    • http://files.khunterart.com/uploads/1/3/1/4/131453399/lukoxifosofug.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/1/0428/5923/3443/files/81085534013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7950/6847/files/sabapubegewudofazuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6901/3157/files/70225551694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/66822771112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9540/0349/files/44488308193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/manaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/87655904948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/95682658230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9899/6889/files/88792711885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7618/1400/files/sixevabobufazanipez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/zuxorexopuluxozawejisugun.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 7

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_off00010786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10786 5316 bytes
SHA-256: ac7e9575d180c31a9fa1524c7afd989770dc8b18ba3323f2ea5d8022d5157376
font_01_sfnt_off0001197b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197B 11044 bytes
SHA-256: 2b0942b836ff073e6b9cc640be234cc4a29d7f96c69b504c02d0cc6807efc046

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