Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b069812dda0f20…

MALICIOUS

PDF

47.5 KB Created: 2020-09-01 12:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6a84d6f9cd54c4348b1de70f6375ef3 SHA-1: 712e88614cbb641711efce268d80ea3af199c449 SHA-256: 53b069812dda0f20d1bafcac1e0bf19635e09451da76773011dc89d522564c87
152 Risk Score

Malware Insights

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

The PDF document is disguised as an 'Ainslie village application form' to trick users into clicking embedded links. One critical heuristic indicates the PDF contains a malicious redirector link, specifically 'https://ttraff.cc/wix?keyword=ainslie+village+application+form'. Additionally, the PDF features a link farm pointing to numerous other PDFs, suggesting a broader distribution or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/wix?keyword=ainslie+village+application+form
    • https://static.usrfiles.com/ugd/b5472a_6ca94b1ffe4f4604a23133f46f235edc.pdf
    • https://static.usrfiles.com/ugd/afe78f_f75f878152994c23a6bd7aebe3fc5d9e.pdf
    • https://static.usrfiles.com/ugd/3aee12_68a7a5fd47d9468bbe77443efb0872f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_29d3032025114b37a63b1c20dcdd4ee5.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/vezowevaje.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1788/files/dexijalarunoxaneziwe.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/daruduni.pdf
    • https://static.usrfiles.com/ugd/b8c837_32cbcedc46614bba9b707882b1501de3.pdf
    • https://static.usrfiles.com/ugd/d01287_2cc2f5b5732f42ba83f8f84ef38962b4.pdf
    • https://static.usrfiles.com/ugd/769f78_a1aa90ebb6604abdb2a485e6a4c47a8e.pdf
    • https://static.usrfiles.com/ugd/1df9ea_fd278a0a08f14525bdf3b0f39c202782.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006db0.bin
0818386d48e1384baeda77789b35eedb65435f900eddc83216439790d91539a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB0 5172 bytes
font_01_sfnt_off00007f30.bin
b2339c700ed43aa83f6bd587994116428f7cb0553ad8377c6f3772f00d0f0d66
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F30 10536 bytes
font_02_sfnt_off0000a313.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA313 4324 bytes