Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea6b6321afe0efd…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 05:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 188ebb995d1580feedef88a7764a1416 SHA-1: c4e07781aeafec9ff8e95ce1e8852fab9556c512 SHA-256: 8ea6b6321afe0efd00f498ab0f2a731b3a0c0302773994def1b6f4a77d4513c8
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=ark+perlen+farmen, which is a known malicious redirector. The presence of numerous links to other PDFs, as flagged by PDF_SEO_LINK_FARM, further supports the attack pattern of luring users to potentially harmful content.

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=ark+perlen+farmen
    • https://cdn.shopify.com/s/files/1/0432/9740/7126/files/matakawebo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/44085780320.pdf
    • https://cdn.shopify.com/s/files/1/0434/2684/0737/files/pegevemolekebelovo.pdf
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/14357385813.pdf
    • https://static.usrfiles.com/ugd/7f16bd_bdcf6cc9161d4960917fb9e5443670be.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2b7ad57c16844b7aa4a5a192e0c8564.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f09e834ede14f4287359d0c1aa2bbd8.pdf
    • https://static.usrfiles.com/ugd/a76634_f01727be5df347a9817805289545da00.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8b935c27f3848fcb1c1a7360abe710a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bb2aa7339834f3a8358bd9568f5b3e9.pdf
    • https://static.usrfiles.com/ugd/ea78e0_ade1216a72e148988ecc9d69ee1195e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_84e7eea281714fa3a1c0a06a05a3401c.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_off00005975.bin
556ddaff26a1d6dc79b639e1bbbca89da0b09d977b77dfe7cb6ae16edacb5d66
pdf-font-stream PDF embedded font (sfnt) at offset 0x5975 4472 bytes
font_01_sfnt_off00006870.bin
64a621679828c592b72698419ff22f93be511931b3b1de20e2f59ea7e714aa9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6870 13512 bytes
font_02_sfnt_off000092ea.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x92EA 4324 bytes