Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2630a5fb2ca08f…

MALICIOUS

PDF

39.0 KB Created: 2020-09-03 01:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57f43aca10d4dada57d43252a2c9c8c9 SHA-1: df22018392f8cd4cc658f78aaa7e9b2a386b6d95 SHA-256: fa2630a5fb2ca08f70cd54c2ce7a300fae3d4a857b0639c32cc9adf909bb9a85
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, disguised with a keyword related to 'whatsapp for android'. This indicates a social engineering attempt to trick the user into clicking the link. The document body, though heavily corrupted, contains the same URL and references to 'whatsapp for android', reinforcing the lure. The presence of a link farm heuristic suggests this PDF is part of a larger campaign to distribute malicious 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.club/wix?keyword=whatsapp++for+android+2.+3.+5+gingerbread
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3003/files/world_currency_symbols_with_country_name.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/20145695898.pdf
    • https://cdn.shopify.com/s/files/1/0454/6048/8350/files/learners_permit_study_guide_wv.pdf
    • https://static.usrfiles.com/ugd/b8c837_f66ac0daeb2f408eb6c9e2a914be82ff.pdf
    • https://cdn.shopify.com/s/files/1/0433/6821/8780/files/sirefunuxozunowefos.pdf
    • https://cdn.shopify.com/s/files/1/0433/6707/1894/files/goanimate_character_creator_comedy_world.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/lagu_bvsmp_i_need_you.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/nesesibenebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/vibamupuse.pdf
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/how_to_convert_coreldraw_file_into.pdf
    • https://cdn.shopify.com/s/files/1/0463/3713/0658/files/brother_day_special_whatsapp_status.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_off00005a7b.bin
d7f1a31a06144ce422b10264ea24775f3f0fc920bb960ee63fe6d077eb949322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7B 5876 bytes
font_01_sfnt_off00006e86.bin
18ef6354a51344939f403de7a8de6d4246b4eae77e3e7df51facf58861fe8587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E86 9748 bytes

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