Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe61fdbbb553676…

MALICIOUS

PDF

45.6 KB Created: 2020-08-21 07:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b127e6c51dd6ee516d5c78b7d622ca45 SHA-1: 2dc1253314c5fac3e62329441f0623a08a090fbb SHA-256: 8fe61fdbbb55367612f04c5353c4fc528f4ab91400af7c9fe5ad52084cedc35d
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Link T1204.001 Malicious Link/Object: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=whatsapp++windows+7', suggesting a lure for users seeking information about WhatsApp on Windows 7. The presence of a large number of links to external PDFs, many hosted on Shopify, indicates a link farm strategy, likely to improve search engine ranking for malicious content or to obscure the final destination. The SE_QR_LURE heuristic also suggests a social engineering tactic, though it's less definitive without a visible QR code.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=whatsapp++windows+7
    • http://files.minafoodsinc.com/uploads/1/3/2/8/132816195/424817.pdf
    • http://files.fallenheroestattoo.com/uploads/1/3/2/6/132696512/bosuvabofa.pdf
    • http://xatosesem.galitgovezenskyphotography.com/uploads/1/3/1/4/131406427/9181626.pdf
    • https://cdn.shopify.com/s/files/1/0441/0372/9304/files/artritis_reumatoide_juvenil_medigraphic.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/40558707586.pdf
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/87800411238.pdf
    • https://cdn.shopify.com/s/files/1/0446/4757/9811/files/les_coliformes_totaux_et_fcaux_dans_l_eau.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/unfollow_on_facebook.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/35682318108.pdf
    • https://cdn.shopify.com/s/files/1/0438/0668/7389/files/83050786724.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/xabowadotozomizedi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2419/4468/files/8900539755.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/julanefiwozuxam.pdf
    • https://cdn.shopify.com/s/files/1/0435/7236/3432/files/5572300433.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/84763135097.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/look_of_disapproval_text.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006393.bin
04b254f4ed3d1d7a2bc225ecc08b1f1ef61a6a8912c0b331d8b86bca64d74438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6393 4776 bytes
font_01_sfnt_off000073d9.bin
a7da18fa0c2b9874189f90a89ef785d9ce345a14126af34ffde298e16b01fe65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D9 14572 bytes
font_02_sfnt_off00009be5.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE5 4324 bytes

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