Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee540f4f7e0ad043…

MALICIOUS

PDF

42.4 KB Created: 2020-08-19 19:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6add2f8967f28a78f8bde1c01c5d281b SHA-1: 64876208198befbac34c0981fd1b73542534f057 SHA-256: ee540f4f7e0ad043e9c6f81af36db8cbb0859fc0bfd6e7c4e2b402325b36a99a
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru' with a keyword suggesting a lure for antivirus software. Additionally, a PDF link farm heuristic indicates the document is designed to host numerous external links, likely to obscure malicious destinations. The embedded URLs and the document body, though partially corrupted, reinforce the lure of a free antivirus update. No scripts were extracted from this sample.

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=avira+antivirus+free+offline+update
    • http://files.freshskintattoos.com/uploads/1/3/2/8/132814967/2bbe538.pdf
    • http://files.ipuwaifarm.co.nz/uploads/1/3/0/9/130969434/2322235.pdf
    • http://tibubilu.ourdentistjohn.com/uploads/1/3/1/3/131378970/levemepopok.pdf
    • http://files.aryanbhasin.com/uploads/1/3/0/7/130740092/velenit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17612659915.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/26043482137.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0302/files/deguxaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/0301/7378/files/wonobuminufewobeta.pdf
    • https://cdn.shopify.com/s/files/1/0437/8751/8104/files/36337460234.pdf
    • https://cdn.shopify.com/s/files/1/0440/0198/4662/files/engineering_drawing_basics_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3641/files/manual_apqp_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/tulumev.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/arp_scan_windows.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/buniroxal.pdf
    • https://cdn.shopify.com/s/files/1/0437/9217/1165/files/all_i_want_for_christmas_is_you_chords.pdf
    • https://cdn.shopify.com/s/files/1/0435/5666/7551/files/bubemupibob.pdf
    • https://cdn.shopify.com/s/files/1/0440/5598/6341/files/zotojafomubi.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_off000066fb.bin
477f618f23512a83f6baa96f95ea899a655d3a0e9d1c3267eb865e9c5a8925d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FB 5084 bytes
font_01_sfnt_off00007858.bin
cd9c65b800196dd3a6b2f9385bf7dd08d6f38a1274fdde98022e4f7dc9a8835c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7858 10636 bytes

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