Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4441602de14e252…

MALICIOUS

PDF

44.2 KB Created: 2020-08-30 09:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe327a4baa86f3bb66b2b35efa61a6c3 SHA-1: 873cfe28e8400d793bd4b8527e4862751d12bfd1 SHA-256: d4441602de14e2526af6c80cbf7220077c17c1651ba418552ec8638ba58a3e89
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to seemingly benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Tap dancing to work' and the malicious URL, suggesting a lure to a malicious site. The presence of numerous links, including the malicious one, indicates a link farm strategy to obscure the final destination and potentially leverage SEO tactics.

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=tap+dancing+to+work
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/regag.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/78169824511.pdf
    • https://cdn.shopify.com/s/files/1/0432/4553/5400/files/cg_police_constable_question_paper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/1572/4456/files/accounting_information_system_multiple_choice_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/64702845319.pdf
    • https://cdn.shopify.com/s/files/1/0463/0393/6669/files/63805854624.pdf
    • https://cdn.shopify.com/s/files/1/0435/4061/1226/files/bidulikebovuvelukux.pdf
    • https://cdn.shopify.com/s/files/1/0433/4125/0714/files/katelyn_tarver_love_me_again.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulifagavukaxubodipiripu.pdf
    • https://static.usrfiles.com/ugd/b8c837_b88d344323bb46cabc741122bd7c87af.pdf
    • https://static.usrfiles.com/ugd/0a052f_c1f040ff9a8e4b8f81962184710d4f4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a4cee9358854ee29a3e77308ee60d54.pdf
    • https://static.usrfiles.com/ugd/3fc21f_d7cb9437670f41458f6012f70e9da56b.pdf
    • https://static.usrfiles.com/ugd/6116da_8f0f8deb428544229fd7d13422561da6.pdf
    • https://static.usrfiles.com/ugd/b8c837_20cd28342c4c4789b321a1bce7b0533a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5525ed7b916441298663e2afd7080dd.pdf
    • https://static.usrfiles.com/ugd/40b9e6_d7e69ef150d040819d6f4433402330ce.pdf
    • https://static.usrfiles.com/ugd/69695d_f93c3217924b48ea832091f8378334e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5334062b76041b4906fa610bd60d58a.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/
    • https://static.usrfiles.com/ugd/0a052f_c1f040ff9a8e4b8f81962184710d

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da0.bin
fdff58f49cc43041dc00f46d5d6f0997c536650f4e59bd8c994bd338b26feb0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA0 5136 bytes
font_01_sfnt_off00007f3a.bin
7f2a658bbfa4182c2819d8246d6e14ed278225046b70a9e25c41f6b091f83933
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3A 10736 bytes