Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b1af7964fd274e5…

MALICIOUS

PDF

51.1 KB Created: 2020-08-01 19:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66b2459f6dcd38896d0a08cff5f44454 SHA-1: c3c9cd6db6e339a6eff084d9b29c4c189576712e SHA-256: 3b1af7964fd274e504c5c1b73c6237e22664843a4d333a8297166f42dcda75c7
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a redirector URL associated with malicious activity. The document body, though heavily obfuscated, contains text related to 'Saints Row 4 character creation' and a URL that appears to be a lure. The presence of a PDF redirector link and a large number of external PDF links suggests an attempt to drive traffic to potentially malicious content or a link farm.

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=saints+row+4+character+creation
    • http://files.yfyliveguam.org/uploads/1/3/1/4/131438509/5135785.pdf
    • http://files.michellejnettles.com/uploads/1/3/2/8/132816042/rezudunowukisipofum.pdf
    • http://files.eternalskytravel.com/uploads/1/3/1/3/131384113/5611582.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/64848905902.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/22197064833.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0725/files/88590312351.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3559/files/mamewexetalito.pdf
    • https://cdn.shopify.com/s/files/1/0431/3094/5693/files/93331886344.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/71762698556.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/26816003036.pdf
    • https://cdn.shopify.com/s/files/1/0434/1409/3986/files/google_docs_profit_and_loss.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/vagaludiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/2470/1845/files/povenasu.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_off00007f43.bin
cf14ec0d04519fbaf2dcf576ebf5ef07effe49905968d3bdf0d0f516a2beb345		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F43 5136 bytes
font_01_sfnt_off000090ca.bin
2f3f4990420f444d5c9ff960742d900d30e803233a49dce8eb7ddde859bf06af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90CA 15428 bytes

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