Malicious PDF — malware analysis report

Static analysis result for SHA-256 9420aa88efab7c2e…

MALICIOUS

PDF

40.9 KB Created: 2020-08-01 19:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93e8e536da63c1be61b866e81309ecba SHA-1: 7d0450d6208ff055277264eecd8b5a5257447c77 SHA-256: 9420aa88efab7c2eaedfb7a94c0c13de9b12a7d5dff0bb9718bce9c7bef06df9
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is associated with a lure to 'buy roblox exploits'. It also exhibits a PDF link farm heuristic, embedding numerous external PDF links, with the first being to a Shopify domain. The document body, though heavily corrupted, contains the same malicious URL and a call-to-action phrase, suggesting a phishing or scam attempt to redirect users to malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=buy+roblox+exploits
    • http://files.destinationdancesb.com/uploads/1/3/1/4/131453823/ribizozom_marekedukatenuj_dujeg.pdf
    • http://files.premadesignsonline.com/uploads/1/3/2/7/132740723/05207.pdf
    • http://files.agilitydreammaker.com/uploads/1/3/2/6/132683001/vavanoninaduve_goxomatosis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1929/files/patalozugopufobasitu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/jizilopedajubezorogijopad.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/33368430652.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9569/files/9115520121.pdf
    • https://cdn.shopify.com/s/files/1/0432/1171/8820/files/xopixijopitujuta.pdf
    • https://cdn.shopify.com/s/files/1/0443/8904/0294/files/play_prodigy_math_game.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/38837583944.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/39591713500.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0625/files/tamusagubi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/watipasajaxewusute.pdf
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/70290517985.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_off00005a67.bin
13f88c2fbdd3bfc496c815b8c64b6d000beb9ebaa76868e4c1ebe037fc8a2711		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A67 4960 bytes
font_01_sfnt_off00006b63.bin
f3b06dae3d374d8bd873e41fd3f363d8ec03286c158e5428d95c00ee99693534		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B63 13524 bytes

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