Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67b3e683d2c95b3…

MALICIOUS

PDF

42.0 KB Created: 2020-07-29 21:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66ec53f40e34cfcb9887e4651a844b81 SHA-1: fe21ac1c0c6e82b3c47cf4f6973f5e56c914f16c SHA-256: c67b3e683d2c95b322d56c0964a4e4e7840f56b6e1f215007d60552b29467eea
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to 'Adobe acrobat pdf viewer apk', suggesting a lure to trick users into downloading malicious software. The presence of numerous PDF links, many hosted on Shopify, indicates an attempt to create a link farm for SEO manipulation or to obscure the malicious redirector.

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/pify?keyword=adobe+acrobat+pdf+viewer+apk
    • http://files.heatherlabbeart.com/uploads/1/3/2/7/132712214/lixerogiv.pdf
    • http://files.katillacmoments.com/uploads/1/3/0/7/130739525/wobep.pdf
    • http://files.foreveryoung.website/uploads/1/3/0/7/130739144/21c3d80c76b63.pdf
    • http://files.speakadelic.com/uploads/1/3/0/7/130775304/venusun.pdf
    • http://files.salvationpromises.org/uploads/1/3/1/6/131637695/kisobogodewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/kipajozobiwuzajeloxem.pdf
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/nugilinuzubebor.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/83676093271.pdf
    • https://cdn.shopify.com/s/files/1/0438/2746/2301/files/wenifejomabotirob.pdf
    • https://cdn.shopify.com/s/files/1/0431/0034/0381/files/51561769576.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/niripopawow.pdf
    • https://cdn.shopify.com/s/files/1/0437/7857/2450/files/80581437286.pdf
    • https://cdn.shopify.com/s/files/1/0431/8242/4215/files/xameribejuxenenawew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3100392900.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0694/files/74424192497.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_off0000671b.bin
b22c9b08314dd3794ec4d869ede4b8e4852efbed0af189cad73a2d7545deeec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671B 4964 bytes
font_01_sfnt_off0000782b.bin
f6f84d2a261ec813a61ccd4b3b983c5dc689605b4164290107bbc5ea93adb338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782B 10176 bytes

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