Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3742a1ecdaa14c4…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 22:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b8970c18e37067b47d687e130112ad5 SHA-1: aef0bfff48156d225042ab8edcfe75ff2dd88572 SHA-256: f3742a1ecdaa14c4058a66d83eb5d8577459abe8a2d23e7e403e2f0b2ff72a71
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to the malicious domain ttraff.ru. This indicates a link farm or redirector strategy designed to obscure the final malicious destination. The document body, though heavily obfuscated, contains the text 'Abstract test practice pdf' and the malicious URL, reinforcing the lure.

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=abstract+test+practice+pdf
    • http://wifot.balikbayanboxumacky.com/uploads/1/3/1/8/131856158/kotap_sarepuboxivi_borepolexilema_giwuvorefiresiv.pdf
    • http://files.edmotivate.com/uploads/1/3/1/4/131454109/judipefogoserisu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/xegebijudaro.pdf
    • https://cdn.shopify.com/s/files/1/0434/6531/0373/files/44933149572.pdf
    • https://cdn.shopify.com/s/files/1/0448/2298/6914/files/verusisewelisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/solumukone.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/29477072021.pdf
    • https://cdn.shopify.com/s/files/1/0433/3607/3366/files/zitadakukoliravi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/81091911350.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/73732939768.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/76029992510.pdf
    • https://cdn.shopify.com/s/files/1/0431/3651/6250/files/nuvovadapudevamipitavam.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/guvod.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_off00006653.bin
7db91025df95572787ed08302b6eb2c7400f268db409f9783f4492d5122c403a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6653 5248 bytes
font_01_sfnt_off00007829.bin
e2fc56e032b59d4ff99c7a16712f2a51336c0ee45e7e0488771f0ed1714c5452		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7829 10112 bytes

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