Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c83eb3db44e9019…

MALICIOUS

PDF

47.1 KB Created: 2020-07-31 08:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dacee3800dc0cf800065f1fe53250d1 SHA-1: 7643e2a16dbe9cef48bb6399a64026366d017a28 SHA-256: 4c83eb3db44e9019e52f57a7af38d6b4cf8b707fe3435d9d191d5b0b86c8208e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded links that redirect to malicious infrastructure, specifically a URL associated with a redirector. The document body, though heavily obfuscated, suggests a lure related to a "rifle marksmanship manual". The presence of a PDF link farm heuristic indicates a large number of outbound links, likely for SEO manipulation or to distribute malicious content. The primary malicious IOC is the 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.ru/pify?keyword=army+rifle+marksmanship+manual+pdf
    • http://files.pnagkc.org/uploads/1/3/0/9/130969032/3b92394b34.pdf
    • http://files.mysustainablefashion.com/uploads/1/3/0/7/130776682/pozobemogu_naniv_dibibekepa_niwugab.pdf
    • http://files.mindbodycounselingllc.com/uploads/1/3/2/7/132740294/9a8a4e95547d.pdf
    • http://files.rondix-flatcoated-retrievers.com/uploads/1/3/2/6/132682790/ffe74.pdf
    • https://cdn.shopify.com/s/files/1/0430/1894/4665/files/wuwowegavidipojemutowiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5104/8357/files/29386122070.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/50604628783.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/jekulodiwumuronuzanak.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/limakoguke.pdf
    • https://cdn.shopify.com/s/files/1/0433/4508/4574/files/63225556566.pdf
    • https://cdn.shopify.com/s/files/1/0432/5831/4912/files/nabadogujegobiwipu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4790/3654/files/wogijigadibufanakubakip.pdf
    • https://cdn.shopify.com/s/files/1/0438/4551/7469/files/fomada.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzibuwusupamodugibeboz.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/
    • https://cdn.shopify.com/s/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079e4.bin
b8b98db94b64ea5ed592989f6c197c23692293aa3bdc2246ed3169abcca66745		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E4 5128 bytes
font_01_sfnt_off00008b18.bin
473b5ba828f27746f6b8d4d0576a36cc8252de388f66fc93ea481d9c87107459		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B18 10804 bytes

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