Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c19374b9d574ca9…

MALICIOUS

PDF

45.4 KB Created: 2020-08-31 02:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 451248c5b935624a7fcb79b553dffb14 SHA-1: 7354791a14571657a307ab095e76c9b7738b6f51 SHA-256: 7c19374b9d574ca953e8c454d3c5b6a88327fbed4ff6d877efc1a6ec3947bf46
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Simple compound and complex sentence' and the malicious URL 'https://ttraff.cc/wix?keyword=simple+compound+and+complex+sentence'. The presence of a link farm heuristic further suggests an attempt to distribute content or traffic through numerous external links, with the primary malicious link being the highest priority IOC.

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/wix?keyword=simple+compound+and+complex+sentence
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/letter_from_birmingham_jail_critical_thinking_questions.pdf
    • https://cdn.shopify.com/s/files/1/0435/5391/5043/files/44754201206.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/25569458017.pdf
    • https://cdn.shopify.com/s/files/1/0430/7668/1882/files/fofovape.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/23275740938.pdf
    • https://cdn.shopify.com/s/files/1/0438/5705/1808/files/baixar_o_alcoro_em_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/xuwawasujemurapanafudes.pdf
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/unordered_map_does_not_name_a_template_type.pdf
    • https://cdn.shopify.com/s/files/1/0428/2354/9094/files/look_i_am_making_all_things_new.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/gafazekojita.pdf
    • https://static.usrfiles.com/ugd/24853a_22d38cbad8bd42f495a31b7936ff0f22.pdf
    • https://static.usrfiles.com/ugd/f09a9d_72d02ee5d2fa4041a2b26c846187fe95.pdf
    • https://static.usrfiles.com/ugd/b8c837_70ea986a99f647a39e252f77bb668ac2.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_off000072d4.bin
c3d3311d761851be46b89ab45dd3d9178b6b77d68cf471442fa725503a966f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D4 5296 bytes
font_01_sfnt_off000084ba.bin
d95646554e87f8c1b3894523f205fe828295c454f260ab69e39a369c610cf5f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84BA 10832 bytes

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