Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1a41c590c44757…

MALICIOUS

PDF

46.3 KB Created: 2020-08-22 02:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 504be089d292892daf1ae548f2e8102a SHA-1: 1d66d9fd32af3bbd57b0a851c8000df065df6227 SHA-256: fc1a41c590c44757c709da97d3eae594581090d2f8323a17224feb731938f6c0
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector, disguised as a CBSE exam date sheet. The primary malicious URL is ttraff.ru, which redirects to a page related to exam dates. The document body, though heavily obfuscated, contains references to the exam date sheet lure and the malicious URL. The presence of numerous external links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination and potentially improve SEO for malicious content.

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/pify?keyword=cbse+12th+board+exam+date+sheet+2018
    • http://files.theirmodernlove.com/uploads/1/3/2/3/132302871/belozoba.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/41500177160.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/download_buku_akuntansi_manajemen_mulyadi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3607/3366/files/15446473455.pdf
    • https://cdn.shopify.com/s/files/1/0428/8351/4527/files/jatokawif.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/arifureta_light_novel_volume_9.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/amharic_alphabet_with_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/complete_makeup_brush_guide.pdf
    • https://cdn.shopify.com/s/files/1/0449/0939/6123/files/68767862412.pdf
    • https://cdn.shopify.com/s/files/1/0459/9942/3647/files/86059569189.pdf
    • https://cdn.shopify.com/s/files/1/0435/3412/3157/files/ukulele_tuner_apk_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0435/5247/3243/files/43532582429.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_off00006035.bin
df0e4c1b460dc15fbe44700909e071b5cfc1d62699ec5fdd84bccf5c299748fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6035 5664 bytes
font_01_sfnt_off0000734f.bin
73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734F 1936 bytes
font_02_sfnt_off00007c92.bin
973800ee82f21e19e977587648f9333358c538d8f045ec20c5df81a5972278f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C92 15336 bytes

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