Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c98d7a7f4fa7f9…

MALICIOUS

PDF

33.1 KB Created: 2020-07-31 17:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a80ad4f23e7149448663d42cc77846af SHA-1: 0d4b7bea0a74411c7daa70906dc9012c3d9914de SHA-256: 49c98d7a7f4fa7f94ed4b6e80a2a352a791ec77c9da0294e620a6efeab80a820
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=panasonic+kx-+t7633', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files hosted on cdn.shopify.com, suggesting a coordinated effort to direct users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=panasonic+kx-+t7633
    • http://files.samanthafortenberry.com/uploads/1/3/1/6/131606491/xuret.pdf
    • http://files.artemisassessment.ca/uploads/1/3/0/8/130814127/1624758.pdf
    • http://files.softerthanbrittle.com/uploads/1/3/1/0/131070500/tilaxajisiwixibof.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/35511629706.pdf
    • https://cdn.shopify.com/s/files/1/0432/7905/7056/files/8724176264.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/23864360609.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/tazudumiwisidugolexi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3830/1590/files/88911960256.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4592/files/paxaxidevesevazonev.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4245/files/25884574484.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7365/files/jusufexerexizajeletuli.pdf
    • https://cdn.shopify.com/s/files/1/0428/9606/4671/files/tifogisozufesaxob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotedijulukamani.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/76828010551.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_off00004346.bin
0f890ed424e752dbd7bda42d93886d8dd9af52936309f1dbef1a8a3a88425807		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4346 5228 bytes
font_01_sfnt_off0000553a.bin
5b0c2aad77871036a644eedcf7f6d064a1033b62457a09a9d5237975c8576166		 pdf-font-stream PDF embedded font (sfnt) at offset 0x553A 9748 bytes

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