Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97674a5887b11cb…

MALICIOUS

PDF

47.0 KB Created: 2020-09-19 00:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02ee47ca3eabdd0e417d642ad2a95c04 SHA-1: e30a2d905551ff2400f927fe9eeb5c776f58d8fc SHA-256: a97674a5887b11cbee70e48ace05b53db03ea407a0f23f698aa166f917b9e62f
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru' with a lure related to a game hack. The document body, though heavily obfuscated, also contains this URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to improve search engine ranking for malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=dragon+world+hack+v.1.1
    • https://cdn.shopify.com/s/files/1/0434/6164/0352/files/bifux.pdf
    • https://cdn.shopify.com/s/files/1/0438/6678/3899/files/linkedin_profile_picture_full_size.pdf
    • https://cdn.shopify.com/s/files/1/0434/8051/4713/files/rekomendasi_browser_android_ringan.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/conceited_crossword_answer.pdf
    • https://fdcc539f-bb4f-46e3-a135-dcbdd6a6f56e.filesusr.com/ugd/d31907_028bda09ab124df4af873935d4ea4784.pdf?index=true
    • https://33f52eb3-bc7e-4b03-adb2-502dfd2dd83e.filesusr.com/ugd/b14caa_9660b7bd579f4840bef383cab22610f7.pdf?index=true
    • https://82725a26-8ab7-4e3c-b86f-18c4f7ea0598.filesusr.com/ugd/5e81b9_83e07644d5ce4dbbbbfabd88a271e23e.pdf?index=true
    • https://ce33de2d-a586-4a77-a0cd-3496b1520f9d.filesusr.com/ugd/5b9a87_e44250c9cfcf4fc48697744512bfb2d6.pdf?index=true
    • https://bf880089-14a5-4014-bb6e-faef0ad9f9f7.filesusr.com/ugd/baa514_11cfb254f94e489985245344b4153069.pdf?index=true
    • https://7201e83b-cf79-4668-8bb2-bf3b98cd9fb8.filesusr.com/ugd/11b39a_abdef4a985f04ee48f889c61c8b9028c.pdf?index=true
    • https://03ae9e85-d452-4e27-af28-7bc898c69737.filesusr.com/ugd/6fd45c_e51f2e9d21f24b5a9e3f83972ee2d764.pdf?index=true
    • https://11c47e81-fd2c-488a-923e-8364e9973dd7.filesusr.com/ugd/5a1791_3338050a918b444c82be5ca746e2d97b.pdf?index=true
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006261.bin
619a44e8b5c2a2d3fc0e18259d8022938ad4f8b30552901bc68dc41c3d0f2ef0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6261 2880 bytes
font_01_sfnt_off00006c9f.bin
1bfde06a5298cd041a09946048f9758555ca2081431ca0a44bebc8cf8a40e80c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9F 4864 bytes
font_02_sfnt_off00007d29.bin
6eb10df204271ef46815cc36351e51e7cf84bd4e6e137500ae146342b26435b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D29 10296 bytes
font_03_sfnt_off0000a065.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA065 4324 bytes