Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eca2467f3d92ac5…

MALICIOUS

PDF

55.9 KB Created: 2020-08-25 16:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07baefa50188807f7d6d112f0856a88b SHA-1: ee3aa28ba545196041e95dd930c5fcb2ffdc8ead SHA-256: 0eca2467f3d92ac5cc4dd90366ed9ac2c0ec2462c125ffdb7d14d4c7ede29421
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in a social engineering lure for 'free antivirus'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the presence of embedded URLs and the redirector suggest an attempt to lead the user to a malicious site, potentially for malware download or credential harvesting.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.com/pify?keyword=free+antivirus+for+laptop
    • http://files.eternalcycleworks.com/uploads/1/3/2/3/132302910/36329042d0d64.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9046/0324/files/technical_communication_11th_edition_mike_markel.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/surmai_fish_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0435/3441/8075/files/pizepibumusizuwesisosinug.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/57477865452.pdf
    • https://cdn.shopify.com/s/files/1/0432/9229/5333/files/que_es_biblioteca_virtual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7456/files/88136868299.pdf
    • https://cdn.shopify.com/s/files/1/0428/7397/9043/files/butomi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1288/0544/files/worixusunurebadepalot.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4602/files/mavugalixerilesabezaji.pdf
    • https://cdn.shopify.com/s/files/1/0434/2199/1079/files/93316074264.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/wosapamukogubi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9273/8201/files/davaragonomifexexi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/character_in_a_beatles_song.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009fec.bin
662898fe20192c3ee1bd085651d51809be512c4c0bef3a48e0148de69e627cc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FEC 4908 bytes
font_01_sfnt_off0000b0b6.bin
9eca448bf6609a1572bc3aca184b48c2e7d8527a8833af88c5c061b9a70b764e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B6 10024 bytes

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