Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d4cb424e4e5543…

MALICIOUS

PDF

41.6 KB Created: 2020-08-15 06:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48cb63c4b3502e19df6d7edb59457257 SHA-1: a94b2676595cb19681fd8fda2f570df2486ef887 SHA-256: 28d4cb424e4e55434b89ebe345f886ef91e2a0d6effa398f057e0910b51670e9
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'wifi file transfer software for android' and the malicious URL itself. The PDF also contains a mass external PDF link farm, with many links hosted on shopify.com, suggesting an attempt to leverage SEO for distribution. The primary malicious URL is reconstructed from the document's 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.com/pify?keyword=best+wifi+file+transfer+software+for+android
    • http://gupuk.cartradio.com/uploads/1/3/0/7/130776436/tofodotapepon_bagago_xerakotetigawok_lezegazekowu.pdf
    • http://files.cloudvalleycashmere.com/uploads/1/3/1/4/131453213/fenidakegezasax.pdf
    • http://files.whikdhawaii.com/uploads/1/3/1/4/131438617/322b122f9.pdf
    • https://cdn.shopify.com/s/files/1/0438/3142/7234/files/59460210078.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/commentaire_compos_les_caprices_de_marianne.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/212_419_4555.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/79569255157.pdf
    • https://cdn.shopify.com/s/files/1/0437/1523/1895/files/dubuzakinuzavamaxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaxolaxowixinetubosi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/80970998434.pdf
    • https://cdn.shopify.com/s/files/1/0438/5298/8566/files/5th_symphony_beethoven_piano.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/jazomabewazikesoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1891/9837/files/baldur_s_gate_descent_into_avernus_download.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_off000064f3.bin
172e7389984fc799a14ddd01e83c2a89eb773fc2cd794ec012e04ed6a6277484		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F3 5040 bytes
font_01_sfnt_off00007635.bin
1a790c17654dac9d0087c6cd3ffb2df109bfb2798844e943c9d308f5fc2251d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7635 10360 bytes

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