Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4000366e58a8fa…

MALICIOUS

PDF

48.8 KB Created: 2020-08-03 00:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fff07f3224491b028348a64fe9eb6a2b SHA-1: e377d2a769addee7cb428a81787a84dffef53895 SHA-256: 4a4000366e58a8faebf517f85a324bb9f5938ea1544db793bdaebb5d374d3bea
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a known malicious redirector infrastructure. The document body contains text that appears to be a lure related to 'Stardew blacksmith or prospector', and the primary malicious URL is https://ttraff.ru/pify?keyword=stardew+blacksmith+or+prospector. While many other links point to Shopify, which hosts benign PDFs, the presence of the malicious redirector is the primary indicator of malicious intent.

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=stardew+blacksmith+or+prospector
    • http://files.blindsidecounter.com/uploads/1/3/2/6/132683330/6b3f59121e.pdf
    • http://files.sacredfireacupuncture.com/uploads/1/3/1/6/131607467/pituvilox.pdf
    • http://files.ragetoknow.com/uploads/1/3/1/3/131383456/rovuguvagat.pdf
    • http://files.friendsofthefergusonforest.ca/uploads/1/3/0/8/130874063/tuson-vosesemajuf-wasatofadivi-togutuzekizi.pdf
    • http://files.nathanpetek.com/uploads/1/3/1/8/131859370/5657521.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0132/files/tubozog.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/penosud.pdf
    • https://cdn.shopify.com/s/files/1/0440/7610/5893/files/29891782257.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8343/files/82545044280.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8242/files/58296561446.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxepetumikikexozifaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3668/0102/files/54693017015.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/36913331251.pdf
    • https://cdn.shopify.com/s/files/1/0436/4386/3198/files/how_to_find_slope_from_two_points.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_off00008046.bin
f58177a441163df827143147124f0bcca21b96c971abd598a299da0a4b161e89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8046 5712 bytes
font_01_sfnt_off00009399.bin
84b6500516e088f44c2593fac69c43c9675118f437bda2d73e1b78f2aaf2dc53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9399 10200 bytes

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