Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4df4c6a442ed66…

MALICIOUS

PDF

43.9 KB Created: 2020-08-19 08:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a402db07890b25bee88c0671bd8f034 SHA-1: a7be18fd1748880144303b50ea36720c5b5e116c SHA-256: 9c4df4c6a442ed66223292bcf0d7bb43e01dc569e6d1584f83a64266d66f637d
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=android+action+bar+back+button+animation'. This indicates the document's primary purpose is to lure users to a malicious site. The file also exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on Shopify, which is a common tactic for SEO poisoning or distributing malicious content. The document body, though partially corrupted, contains the malicious URL and references to Android development, likely as a lure.

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=android+action+bar+back+button+animation
    • http://files.riversplusguiding.com/uploads/1/3/1/3/131381640/9359488.pdf
    • http://sedajetul.pccaces.org/uploads/1/3/0/8/130814411/luwib.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/gurivunawixabitagosozid.pdf
    • https://cdn.shopify.com/s/files/1/0432/8685/5840/files/kiguloriborizomiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/ramevazoxevaxibijekopobo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/jilajiwopinige.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/escape_from_tarkov_tips.pdf
    • https://cdn.shopify.com/s/files/1/0434/9788/1766/files/37286811958.pdf
    • https://cdn.shopify.com/s/files/1/0447/0757/8009/files/diccionario_biblico_mundo_hispano_completo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8326/8257/files/xumusafuzure.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d8.bin
672435f443c6e2e40152690df04dc316eddac3b94a65186c8904654a02e10f75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D8 4832 bytes
font_01_sfnt_off0000731e.bin
630b68de89b74770eb4fa1653f11c0eb76c50850e71c9bd9c58f3c12e5614731		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731E 9824 bytes
font_02_sfnt_off000094c1.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94C1 4324 bytes

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