Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6ca7dfe39247cf…

MALICIOUS

PDF

36.3 KB Created: 2020-08-14 06:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68d0209807378ab3861f5ad8b2233fd6 SHA-1: 402102d4da92ed401af453d3ca626151242f086c SHA-256: fb6ca7dfe39247cf3bc35de1efeeafadc94025cc2a0a9ab2a26bf72d81fcd71b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is disguised as a service manual. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO manipulation or to obscure the malicious destination. The primary malicious URL is https://ttraff.cc/wb?keyword=ir%201730%20service%20manual, which is the most critical IOC.

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.cc/wb?keyword=ir%201730%20service%20manual
    • http://files.nooracademychicago.org/uploads/1/3/2/3/132303374/fb947db7e80f.pdf
    • http://sonafete.recordfit.org/uploads/1/3/1/4/131452903/vuweleza-pubuzugeruwutek-sizevedido.pdf
    • http://files.emilyrosenaturephoto.com/uploads/1/3/1/3/131379801/xidij.pdf
    • http://files.englishservicesforscientists.com/uploads/1/3/2/3/132303269/3a6c72bb1c0.pdf
    • https://cdn.shopify.com/s/files/1/0435/1465/8980/files/the_celebrated_jumping_frog_of_calaveras_county_short_story.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3883/files/bully_scholarship_edition_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0434/1645/3272/files/36477967178.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/62220681946.pdf
    • https://cdn.shopify.com/s/files/1/0429/2699/7663/files/zirolaw.pdf
    • https://cdn.shopify.com/s/files/1/0454/2988/3048/files/cryogenic_engine_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/isocyanide_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6498/files/24659531917.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/22804488813.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/2017_indian_scout_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/9441/6290/files/71577442616.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/ielts_academic_reading_full_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/2635/7160/files/84380038243.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005116.bin
c2c86fa5e701c67fbd079ea6e6987da054822e8877ba14796948ff9bc2ac1f6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5116 5380 bytes
font_01_sfnt_off0000634c.bin
7481f1e00fa3ef6921beff6eea353d068551d521c22721a9746f8e0316ba3710
pdf-font-stream PDF embedded font (sfnt) at offset 0x634C 9700 bytes