Malicious PDF — malware analysis report

Static analysis result for SHA-256 f119968c02a236b2…

MALICIOUS

PDF

38.9 KB Created: 2020-08-23 02:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dc0836ba4a55cf7d00525189e64d939 SHA-1: e3022f721e9a820745d79633d7fee29bd1d6e19c SHA-256: f119968c02a236b2e62ec9770165e39dab452b5989b98b19ebd86525781103bb
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=krups+espresso+coffee+maker+xp+1500+manual'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to a Shopify domain that is part of a larger set of generated SEO PDFs. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a callback lure heuristic suggests a potential phishing or tech-support scam pretext to encourage user interaction with the malicious links.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=krups+espresso+coffee+maker+xp+1500+manual
    • http://liduzu.painterly.shop/uploads/1/3/2/8/132814975/96a79ba.pdf
    • http://files.pro-consolutions.com/uploads/1/3/1/3/131379553/85512d55500435.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9202/files/pujudefusoxop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65817182127.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/29756209356.pdf
    • https://cdn.shopify.com/s/files/1/0439/5266/8830/files/wesoniruwobemawur.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/46677450904.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/dezizazabasonujutemika.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1160/files/arthur_kingsley_porter.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nenixuraxolitater.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_off00005a23.bin
5d026cab2b821816f79cad4a389d60355bfa50efdc398144f067c121b3e3b6eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A23 5580 bytes
font_01_sfnt_off00006d17.bin
a46d738b6a10a0955e8cfd0a4866f5119c171d4f209cba65e7b14c7e8dabb7c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D17 9896 bytes

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