Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b4a7f81aec01b3…

MALICIOUS

PDF

41.9 KB Created: 2020-08-03 18:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c1275b278c76abcb23f22cd096ea09d SHA-1: 547521eb82ef3d8d3f0dcd7b25eb4e3bd2787314 SHA-256: d6b4a7f81aec01b32424b3bb44cfdb81aeb4037210a1dd18ff757d8c0bd7ba3c
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 PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/wb?keyword=swami%20vivekananda%20story%20in%20english%20pdf'. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. No scripts were extracted from this sample.

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/wb?keyword=swami%20vivekananda%20story%20in%20english%20pdf
    • http://xagetax.graceandtruthec.com/uploads/1/3/1/3/131381078/5368368.pdf
    • http://files.foristellchurchofchrist.com/uploads/1/3/2/6/132681144/zafonajugu_pefofuvowukuk_xozifa.pdf
    • http://files.dominicmartinez.com/uploads/1/3/1/1/131163687/pavimokivaton-guguwezobiluf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32823332632.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/11073836611.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/pdf_to_excel_converter_for_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0261/7252/files/57894587880.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5508/files/vimalevelizerimax.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/42255341507.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/gavixepiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/56134160426.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/stack_grows_down.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7811/files/fezivevewozezugum.pdf
    • https://cdn.shopify.com/s/files/1/0434/8231/6957/files/nidomesetagej.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/lagalifamesitosofaf.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_off00006468.bin
de39c2688d9bf444293480b7022e7c587907c7ce0a6f09b589eeb90f3245645a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6468 5876 bytes
font_01_sfnt_off0000785e.bin
f5a7af09c7b6aced2f28f86b6e8e0aebd15b308322b3fe49f6fe1ddeefe8deec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x785E 10040 bytes

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