Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ddb7a767b050a1d…

MALICIOUS

PDF

44.1 KB Created: 2020-08-21 21:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c6fa0d87f43f322d07d47cd826ac1e5 SHA-1: 000a89b1fb7581ade1731bb7228716bbcca88f33 SHA-256: 9ddb7a767b050a1d417ee2f9bd1c58114dcc232f3f6792d4f6aadac3e8f09d8b
130 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it's a malicious redirector, pointing to a URL associated with known malicious infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure. The primary attack pattern involves tricking users into clicking a malicious link disguised as educational content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=jawahar+navodaya+vidyalaya+omr+sheet+pdf+2019
    • http://rupoxep.verycoolgiftbaskets.com/uploads/1/3/2/8/132814930/kakidurolaka.pdf
    • http://sozasiz.samtoth.com/uploads/1/3/2/7/132710712/dawipinelomeje.pdf
    • http://files.gateaumarche.com/uploads/1/3/0/9/130969499/5690647.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/89879731039.pdf
    • https://cdn.shopify.com/s/files/1/0440/7037/1493/files/apotheosis_mod_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9753/files/keto_diet_foods_list_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/74002115162.pdf
    • https://cdn.shopify.com/s/files/1/0444/3337/5399/files/33487257546.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/22396047152.pdf
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/xonizoxovujuzo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7883/4583/files/bamadaxuvotukaroxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9409/7576/files/clinical_infectious_disease_david_schlossberg.pdf
    • https://cdn.shopify.com/s/files/1/0440/9550/4536/files/66286880480.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/85234466117.pdf
    • https://cdn.shopify.com/s/files/1/0432/9986/4734/files/77437997614.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/doxoko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.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_off00006bd4.bin
139affa65e7fe1e0d51199bc69cecefea9efd5fad196a140c845903c40ae6c21
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD4 6008 bytes
font_01_sfnt_off0000803d.bin
22df204dbaf0b02e8ec8737ea04ac5925cef42c269c582387a4fa3471e79c366
pdf-font-stream PDF embedded font (sfnt) at offset 0x803D 10100 bytes