Malicious PDF — malware analysis report

Static analysis result for SHA-256 8456c546d07db9c4…

MALICIOUS

PDF

62.4 KB Created: 2020-08-19 06:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76c8ad76e1602b9728b2f0cb35e84849 SHA-1: ba230d2ad64cfcb7df0f68de627541786df6435d SHA-256: 8456c546d07db9c460bf46d0b03a57d9ee06fffecb88c269cc09e2a0c6f870f9
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Adpro fasttrace software'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to increase visibility of the 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.cc/pify?keyword=adpro+fasttrace+software
    • http://files.prairieartscenter.org/uploads/1/3/0/7/130739831/f6df14.pdf
    • https://cdn.shopify.com/s/files/1/0434/8598/6982/files/attention_schema_theory.pdf
    • https://cdn.shopify.com/s/files/1/0429/1647/9132/files/fetuluxulozeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2485/files/6995223747.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/pijimijajivame.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/alone_boy_hd_wallpaper_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0948/2658/files/wipekazakitobalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/nupim.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/nodowunavagajafozugogisod.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/35649188273.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/dapujezubovoso.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/tejoxewatijenugesivitadi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5675/files/92621306096.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/88659938570.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/51135200294.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_off0000b689.bin
31fbeb6bbdde3c8d33fd8d268b587086523a3a7ad798abb05da3a488b2bca87d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB689 5200 bytes
font_01_sfnt_off0000c855.bin
385496e74ded4432bae7135bc9eb1b3b339c8e978f3b67a5985d4502f7402fc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC855 10712 bytes

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