Malicious PDF — malware analysis report

Static analysis result for SHA-256 878b099ca7a3d033…

MALICIOUS

PDF

42.4 KB Created: 2020-08-26 09:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 740ec2597990ff6b9062fb23745463eb SHA-1: 94f0d7b77cc32ba74e19923140b632da098f1d1f SHA-256: 878b099ca7a3d03392e9561279c689a75104006900202f9c8cbaf2bce47da369
120 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a job application, suggesting a social engineering lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination. The primary malicious IOC is the ttraff.com redirector URL.

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.com/pify?keyword=job+application+letter+for+accountant+assistant+pdf
    • http://files.monakansoh.com/uploads/1/3/1/3/131397987/povuweleka.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/45150001927.pdf
    • https://cdn.shopify.com/s/files/1/0435/2091/7668/files/free_movies_websites_name.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/jozewevugetuvekodigewepog.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/toefl_sample_tests.pdf
    • https://cdn.shopify.com/s/files/1/0464/2488/3352/files/42622899010.pdf
    • https://cdn.shopify.com/s/files/1/0439/9611/9198/files/ledupetivipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/xugefexafivenadugonogek.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/zesixarus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/37200455847.pdf
    • https://cdn.shopify.com/s/files/1/0457/6690/1924/files/seamless_pipe_sizes_in_mm.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/the_air_he_breathes_brittainy_c._cherry.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/66817212072.pdf
    • https://cdn.shopify.com/s/files/1/0446/7779/1897/files/predator_8750_generator.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_off000066a2.bin
7f42900d74a072fbc6e1b783694c4cf58c820a63b30dc9d173ecc086e0c54a5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A2 5276 bytes
font_01_sfnt_off00007892.bin
d7a863928c406dfd09ef7e75d270c23559241bab6de7e34711116f9d149a09b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7892 10472 bytes

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