Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b95878130d402a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-18 19:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1bfcae889234b497ff34e55afd963447 SHA-1: 38ad4a5d6f476a1c2f66cd62feb58bc788b55d57 SHA-256: 15b95878130d402ac6a7b6343df83f20d546891f7431719ebc0d223bf8a91152
234 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is associated with malicious activity. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document attempts to trick the user into executing commands via the clipboard, further suggesting a malicious intent to compromise the user's system. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=date+format+bash+profile In PDF document text
    • http://files.onepercentlegal.com/uploads/1/3/1/4/131407552/pewujemuwote_jovafopu.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/1/0431/7449/4369/files/resovor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/knowledge_encyclopedia_science_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/dusewoxujiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8999/3635/files/thyroid_disease_in_pregnancy_rcog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/28346861850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/bandwidth_place_speed_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4016/9366/files/tererotifepibuvuwet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7504/2457/files/gaxol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6133/6471/files/71344708596.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 1

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_off00005b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4E 5280 bytes
SHA-256: 0a72dde0ccb39623ce4e15f2f9c044265255349c1e40f0413b4b86a111665506
font_01_sfnt_off00006d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D23 13748 bytes
SHA-256: d516afd05390f09e950b182f1ee24458e4c8faaf06d2e567886eb3f3b8a58832

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