Malicious PDF — malware analysis report

Static analysis result for SHA-256 81c132c8d563691d…

MALICIOUS

PDF

65.7 KB Created: 2020-08-30 11:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dba0e6e54ad352cd7a1e4ede7cef1ff1 SHA-1: 0d3e9e9d365f28f18617e7996867d93341b997b8 SHA-256: 81c132c8d563691de665b68b9a8f0c0ffa5ade38039c68549eb92a815138e453
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, including one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document appears to be a link farm designed to drive traffic to potentially harmful sites, masquerading as content related to 'world war 2 map activity'. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=world+war+2+map+activity+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/panaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/7572/3673/files/how_do_i_update_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0433/9236/8798/files/admixtures_types.pdf
    • https://cdn.shopify.com/s/files/1/0462/2155/7914/files/48066297153.pdf
    • https://static.usrfiles.com/ugd/63d3ad_b757a232c87d40d1878f896d2e70958f.pdf
    • https://static.usrfiles.com/ugd/b5472a_f2130a52e8db42cea49395eb9a4cd1b2.pdf
    • https://static.usrfiles.com/ugd/67f5f7_5a8c261379b349c1ac4d7d2cec988231.pdf
    • https://static.usrfiles.com/ugd/e02969_1a9ec1b0f527480f96dbefa3ff18c05d.pdf
    • https://static.usrfiles.com/ugd/9374a7_ea55e42a6dab44fca32d6e7181ad6484.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2cebcae217b434ea6de0aeef9b1e0b3.pdf
    • https://static.usrfiles.com/ugd/98857b_dee327424c5e4713b3acdde4fbe9c5e9.pdf
    • https://static.usrfiles.com/ugd/80bfa9_c96b49939be64b71b55a293eba269e60.pdf
    • https://static.usrfiles.com/ugd/5b9365_6777fb72b42a4c53b3795fa990c42d20.pdf
    • https://static.usrfiles.com/ugd/2486b5_68bd5765f5b84dc583f2340ecde599b4.pdf
    • https://static.usrfiles.com/ugd/c20ea7_c63abf068e5f463087e97126d3671dd3.pdf
    • https://static.usrfiles.com/ugd/c836c3_1c26b66eed0e4f4a8ce360daad2512ba.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c467.bin
50a9089ea4f623ea76bcafcb928abb78d56612023aa1231f53e3c89910e0c644
pdf-font-stream PDF embedded font (sfnt) at offset 0xC467 5524 bytes
font_01_sfnt_off0000d743.bin
4be5885514f9868bd5fbaf40f056bcb48b1f24cbfa52b9c26140a51cbaad4213
pdf-font-stream PDF embedded font (sfnt) at offset 0xD743 10240 bytes