Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b235709b72c8ce1…

MALICIOUS

PDF

44.8 KB Created: 2020-08-23 17:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46bfaeaaf344dae41c04fcc29a72f552 SHA-1: 2906c2d03942ce48e4490366725f2ce84df9589c SHA-256: 1b235709b72c8ce1591dee95238073e74474dfed9314965b3441f501607ad030
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 resources. One critical heuristic firing indicates that the document links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=angielski+techniczny+s%25C5%2582%25C3%25B3wka+pdf'. Another critical heuristic identifies this as a PDF link farm, suggesting a tactic to artificially inflate search engine rankings or distribute malicious links. The document body, though partially corrupted, contains similar URLs, reinforcing the attack pattern.

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.ru/pify?keyword=angielski+techniczny+s%25C5%2582%25C3%25B3wka+pdf
    • http://files.daltonreunion.com/uploads/1/3/1/4/131410952/8c4539827918d6.pdf
    • http://muxuva.laurelmedpa.com/uploads/1/3/1/4/131453252/1977483.pdf
    • http://kiwixoz.whitmoreandwendy.com/uploads/1/3/1/3/131380429/6151118.pdf
    • http://files.cuttingedgesebringfl.com/uploads/1/3/0/7/130740124/vadokapuvilizomur.pdf
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/jzyk_angielski_sownictwo_c1.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9136/files/batman_rises_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/fujemotawivozi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovetutokukike.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/losimudegitidejudiku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46496449222.pdf
    • https://cdn.shopify.com/s/files/1/0439/2163/7544/files/28680423904.pdf
    • https://cdn.shopify.com/s/files/1/0429/3145/4119/files/56009213849.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/funabijoses.pdf
    • https://cdn.shopify.com/s/files/1/0432/8158/0200/files/dibajer.pdf
    • https://cdn.shopify.com/s/files/1/0428/7060/3932/files/80799716731.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_off000066f7.bin
879300dde6b98b5c2539afaf610e1f757a24d3f404722ff8cecf7f7c94d6c0de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F7 5808 bytes
font_01_sfnt_off00007aaa.bin
a81e2208576e72d6798f24e77504c3aeeaba13361c0d071660c641ecc54c685e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAA 13792 bytes

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