Malicious PDF — malware analysis report

Static analysis result for SHA-256 f41bf696c5624b4b…

MALICIOUS

PDF

36.6 KB Created: 2020-08-15 05:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 916017e281f9ddcfb94e4fad1efcae27 SHA-1: 55b612233acb50494f6211c9e5e329c381451197 SHA-256: f41bf696c5624b4b9c2f25b74e47034ddd342baf91165a68e3ef73d05354ec4a
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector at "https://ttraff.cc/pify?keyword=batsu+game+2017". The document body, though heavily obfuscated, contains references to "Batsu game 2017" and the redirector URL, suggesting a lure to a malicious site. The presence of numerous Shopify-hosted PDF links indicates a large-scale SEO poisoning or link farm operation.

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/pify?keyword=batsu+game+2017
    • http://fesuzire.thegooddogfoodbank.com/uploads/1/3/0/7/130738786/6016735.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8068/files/wovufawuxawer.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/vabugumajufavowaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/yify_subtitles_winter_soldier.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gomejalubewetilukifij.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/56447059739.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/80284708894.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2048/files/cecelia_ahern_perfect_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/11658172531.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/76611012081.pdf
    • https://cdn.shopify.com/s/files/1/0439/1917/9931/files/magemuzekonaja.pdf
    • https://cdn.shopify.com/s/files/1/0428/4442/2310/files/18072641692.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/49514685703.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3082/files/68715714796.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_off000052ff.bin
0d915cd7cb3a725557fc37f4972148be9c487b4c4c082fe267de909e8d0d809c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52FF 5332 bytes
font_01_sfnt_off0000651d.bin
0789b24562149a2a741f0cda3be6d0cb70368170950bc48888c2ac78824212f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651D 9604 bytes

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