Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb96d1002b3ef45…

MALICIOUS

PDF

43.6 KB Created: 2020-08-23 08:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56fca087d555db6a631edd1e1fe285d5 SHA-1: c5444ff8b04337b67bc110bc08cf05e3943f4f53 SHA-256: edb96d1002b3ef45904e0f523449f4e4a4780d81cdebd5911fb7d4f914128644
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is designed to lure users into clicking malicious links under the guise of providing information. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=esge+bowel+preparation+guidelines
    • http://files.pa-di.dk/uploads/1/3/1/4/131407135/6371781.pdf
    • http://files.resilientci.org/uploads/1/3/0/7/130738991/tosedokav_gopolupug_vomelukitu_nurokebok.pdf
    • http://files.myssample.com/uploads/1/3/0/8/130874377/7439575.pdf
    • http://files.sarahbutcher.com/uploads/1/3/2/3/132303009/rujemolutari.pdf
    • https://cdn.shopify.com/s/files/1/0437/6644/8277/files/12169606112.pdf
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/nokeximilutelovixowita.pdf
    • https://cdn.shopify.com/s/files/1/0435/1347/9320/files/fezipumat.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/zexepubitusilominezi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7592/8215/files/physics_of_atoms_and_molecules_bransden_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9886/4804/files/91006934267.pdf
    • https://cdn.shopify.com/s/files/1/0429/1647/9132/files/jinuweduwifiwumonapuja.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2628/files/gipugeruwusukeka.pdf
    • https://cdn.shopify.com/s/files/1/0429/5363/8044/files/xixogamesuwobitib.pdf
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/risugojupoxadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4087/files/pujagamoxumujowa.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/kevuloderu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/rigadajulor.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_off00006d50.bin
8edc99657b32676831af0302c06278eda5c680f1f1dc330fd9e78ec942db5e39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D50 5316 bytes
font_01_sfnt_off00007f72.bin
4de9f6b5be5861fb8a397e0647ea8438bd1569268dc944ca47598c8ece0ea7cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F72 9860 bytes

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