Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d79f19d465351a…

MALICIOUS

PDF

54.0 KB Created: 2020-08-17 02:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f0c5ea01fb01e9c61d9c6f6e9773162 SHA-1: e961f4588c6da88ae1ff26007f7a44541471d647 SHA-256: c8d79f19d465351a5c39fdbcdf58701012775eca8a8dc6b3a0262a5263d280ed
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of numerous external links, a technique often used for SEO poisoning or to direct users to malicious sites. One critical heuristic firing confirmed a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=irelia+guide+9.+22'. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a link farm or redirection strategy. No scripts were extracted, but the primary attack pattern involves leveraging these links.

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=irelia+guide+9.+22
    • http://files.umdwrfc.com/uploads/1/3/0/8/130813837/tedubabanib-zotalebit.pdf
    • http://files.mbbizwell.com/uploads/1/3/0/7/130739265/9ec2d091c934.pdf
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/difference_entre_cellule_eucaryote_et_cellule_procaryote.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/60825593403.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/denubol.pdf
    • https://cdn.shopify.com/s/files/1/0437/7283/8039/files/oxford_textbook_of_attention_deficit_hyperactivity_disorder.pdf
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/ladikulakag.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/bixopivuroxol.pdf
    • https://cdn.shopify.com/s/files/1/0440/0594/9590/files/anestesia_local_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0436/5778/9593/files/40137319638.pdf
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/dixifoxisolefejipafe.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006108.bin
8dfbfbdf4d5d28462fec90c8c8b18181bc05da673a5f456ef07c666c6856d187		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6108 4660 bytes
font_01_sfnt_off000070db.bin
15965419359c9c867199866cadc18dfe3c308eb8e9c23a42d13c73d9309dc9e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DB 11412 bytes
font_02_sfnt_off00009749.bin
410a849971d51ab43080311c66a00bcd06a59b9f076061731c2e369be5020f39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9749 16580 bytes
font_03_sfnt_off0000ada7.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADA7 4324 bytes
font_04_sfnt_off0000bb6a.bin
608da7165703b902d85db407fb596c9c9243b781f128346af0253b6c483847d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6A 6064 bytes

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