Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca12bdc546d25111…

MALICIOUS

PDF

42.0 KB Created: 2020-08-18 22:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf2766cad7b9fb316b079306145d0b72 SHA-1: c4ca892eb88212d49c6eea3677205b6499c9d9b4 SHA-256: ca12bdc546d251114d2983ef52a53ab202d6c1a980b685ff4a573f4c6475fd97
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=idrivesafely+defensive+driving+quiz+answers'. The document body, though heavily obfuscated, contains text fragments suggesting a quiz lure. The presence of a link farm heuristic further indicates a malicious intent to distribute content via numerous external links. No scripts were extracted, but the PDF structure and link analysis strongly suggest a malicious redirector pattern.

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.com/pify?keyword=idrivesafely+defensive+driving+quiz+answers
    • http://jexojusem.drewsdecision.org/uploads/1/3/1/6/131607131/5360209.pdf
    • https://cdn.shopify.com/s/files/1/0437/5317/7237/files/rca_tv_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/7654/0834/files/sujets_de_bac_maths_terminale_s_algerie.pdf
    • https://cdn.shopify.com/s/files/1/0440/0431/1190/files/nurafafujosuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4591/9652/files/22836836214.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/38305731780.pdf
    • https://cdn.shopify.com/s/files/1/0439/4670/5051/files/easton_broadhead_tuning_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46905239833.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6197/files/photo_license_center.pdf
    • https://cdn.shopify.com/s/files/1/0448/1833/3858/files/xuxirufodipeganenonamas.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/75862933293.pdf
    • https://cdn.shopify.com/s/files/1/0429/3784/3871/files/clash_of_clans_apk_play_store.pdf
    • https://cdn.shopify.com/s/files/1/0436/2944/5273/files/the_hindu_english_news_paper.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/derigejovanobexedojovexuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/meborabipojesemetotifu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/11356457596.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_off00006480.bin
bfaf04f11cb4dc0fad682c98a3a18477e40d19332768c2daed4007daf8135f09
pdf-font-stream PDF embedded font (sfnt) at offset 0x6480 5444 bytes
font_01_sfnt_off0000772a.bin
e63e71c5b5c99651449bf33c1f076999b3ada710628e56b1c84f413be7c0abce
pdf-font-stream PDF embedded font (sfnt) at offset 0x772A 10456 bytes