Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e1c70109b69e88…

MALICIOUS

PDF

66.6 KB Created: 2020-08-14 20:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bdbd447b8b3dedd928c4258add66c05 SHA-1: 5fa415f2856592b45d29417440c8d2d73384f9d7 SHA-256: 48e1c70109b69e88e5fb54dbe184532b73f6778bf690ade007c2ca9d67a0dc8a
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, suggesting an attempt to game search engine results for free PDF downloads. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/wb?keyword=numerical%20analysis%2010th%20edition%20solutions%20manual%20pdf%20free', which likely serves as the initial lure. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links, reinforcing the SEO spam and potential phishing vector.

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.cc/wb?keyword=numerical%20analysis%2010th%20edition%20solutions%20manual%20pdf%20free
    • http://files.genesysem.com/uploads/1/3/1/4/131454317/4246293.pdf
    • http://gisaw.houseofblackart.com/uploads/1/3/1/4/131407424/af9c1a4576ab8.pdf
    • http://files.roamsoshal.com/uploads/1/3/2/3/132303315/8930853.pdf
    • http://files.beautifulbling4five.com/uploads/1/3/2/6/132681670/1923425.pdf
    • http://files.motherwrenstudio.com/uploads/1/3/2/3/132303219/8164104.pdf
    • https://testbankrea
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/xikugikokexurew.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/8181583624.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/noxebal.pdf
    • https://cdn.shopify.com/s/files/1/0431/4791/9516/files/types_of_food_and_beverage_service.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/21251458478.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/wopimilenekaxepojem.pdf
    • https://cdn.shopify.com/s/files/1/0436/7115/8949/files/78636476774.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/65374515401.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5209/files/jifuvivusugijuwepugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3920/3221/files/38802621293.pdf
    • https://cdn.shopify.com/s/files/1/0435/9408/8611/files/binadixutawilenigufi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/fovuganifokebu.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_off0000a81e.bin
95979ead9cb3c621af0f6bc568ea6477face3a202ee6b4079a5599fd7aa15e2c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA81E 5660 bytes
font_01_sfnt_off0000bb3c.bin
cfee6582055126beeb3d145ecdfee5778f9ec172b7cb62d8225c4fe9227c403b
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3C 12548 bytes
font_02_sfnt_off0000e3f9.bin
ff9749d49ad6eb345c639f89f2669f2e0aa8a74d75f4851abb2a30a5d9c98516
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F9 17112 bytes