Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf60828cb389bee7…

MALICIOUS

PDF

40.0 KB Created: 2020-08-14 18:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 735f9fba17d6d3d34e3e7fc266875571 SHA-1: 220d1590b618fe708acac0eec11a97f2de7f078a SHA-256: cf60828cb389bee7e790b781588f668affc9cf9b3e778d5e0e3e7f0f808e0156
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDFs hosted on various domains. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which likely serves as the initial stage for a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains the same redirector URL and a list of other PDF links, reinforcing the attack pattern of a link farm designed to obscure malicious destinations.

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=volver+carlos+gardel+sheet+music
    • http://files.ampoa.com/uploads/1/3/2/6/132695329/39cf605c8.pdf
    • http://files.besafesafetysupplies.com.au/uploads/1/3/0/7/130739974/nasumososajibom.pdf
    • http://files.artbystein.com/uploads/1/3/1/6/131607522/848609.pdf
    • http://files.maribellyspartysupplies.com/uploads/1/3/0/7/130776131/6371255.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/emarketer_ecommerce.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2346/files/advantages_of_vlsi_technology.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/77752182375.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/77880270929.pdf
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/33073968067.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2309/files/samedasodeditavavikefama.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/44058085631.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/arabian_nights_easy_piano.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_off00005e3e.bin
d0607926f9859d2abc2ad4327a1a67934eba840a8efbe36be81d0a243f66695a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3E 5380 bytes
font_01_sfnt_off00007063.bin
59c5f18012b7f9f3387a5f02965fed2d50533be5a8f068b5f135ebbbdbc7a74f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 10292 bytes

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