Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62d36ec218f852f…

MALICIOUS

PDF

37.2 KB Created: 2020-08-20 02:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4525f88fa53ec5df21a660352ec067a6 SHA-1: f967180d058d25669fd98d577f109446c97c5d74 SHA-256: b62d36ec218f852fea9653d99c3816f88c906eab6870cf2e00f7274916f1ad5a
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=kalender+2018+veckor+pdf'. This URL is embedded within the document body, suggesting a lure to trick the user into clicking it. The presence of a large number of external PDF links, many hosted on shopify.com, indicates a link farm SEO tactic to improve search engine ranking for malicious content. The document itself appears to be a malformed PDF, likely generated by wkhtmltopdf, with the primary malicious intent being the redirection to the ttraff.cc domain.

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=kalender+2018+veckor+pdf
    • http://files.pianomanlarryhunt.com/uploads/1/3/0/7/130776828/1430538.pdf
    • http://files.luvmyhats.com/uploads/1/3/1/6/131637357/5303640.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/zanurajed.pdf
    • https://cdn.shopify.com/s/files/1/0432/3619/6507/files/deturejididikoso.pdf
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/miss_fortune_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/98068060312.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/free_video_call_recorder.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/bejidobolid.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/ribikuto.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4340/files/bestiario_mexicano.pdf
    • https://cdn.shopify.com/s/files/1/0438/6747/2037/files/manosaxutixoti.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/nabisale.pdf
    • https://cdn.shopify.com/s/files/1/0447/3035/1770/files/cds_examination_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/zisijefemobope.pdf
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/retafexasoxusow.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_off0000521d.bin
8cff986373db089182f46647c13b5f46fe66312dbce8e74505a9f6b3af0d5245		 pdf-font-stream PDF embedded font (sfnt) at offset 0x521D 5584 bytes
font_01_sfnt_off00006535.bin
7d48b4493aa0707b5baf61f5737841cb514308e5e0876d4481baf624a728ad50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6535 10320 bytes

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