Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4afd704097291bd…

MALICIOUS

PDF

48.4 KB Created: 2020-08-23 23:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fc23d737e53b5af5650f0f7c424c6c0 SHA-1: 88b9b9d41b214417658a343353782cd350e6abd7 SHA-256: e4afd704097291bdcd45a6adc5ac68516fbf1d1c85657853ba15cdd5f7edc86d
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One of these links, 'https://ttraff.ru/pify?keyword=c+code+format+tools', is flagged as a malicious redirector. The document body contains garbled text but also includes this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to distribute content or traffic through multiple external resources. The primary attack pattern appears to be the distribution of malicious links disguised within a PDF document.

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=c+code+format+tools
    • http://devabex.elaineconner.com/uploads/1/3/0/8/130813509/kizokegoti.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/vikujen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/dead_space_3_save_game_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/bus_game_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/306660031.pdf
    • https://cdn.shopify.com/s/files/1/0429/1185/8855/files/87326783452.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/carotid_doppler_radiology.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/88919383837.pdf
    • https://cdn.shopify.com/s/files/1/0437/7110/1338/files/affect_vs_effect_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/36656105704.pdf
    • https://cdn.shopify.com/s/files/1/0436/1709/1744/files/guxafoko.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/new_version_of_whatsapp_2016.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cd1.bin
ff1cc40c4908ff2d569bbc62481a002a4e4fe3d49779e5b563ca64f6f30eda72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD1 4824 bytes
font_01_sfnt_off00006d2a.bin
c22afc2503a56d9d9c65d7936264c5e9230ac2c306ea76f2a3026cd21c668b83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2A 10308 bytes
font_02_sfnt_off000090b4.bin
863699c8b4f28e8870074e08194d9d61b2861a2aef552398a54e4af87acd5ecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B4 16524 bytes
font_03_sfnt_off0000a6df.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6DF 4324 bytes

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