Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd93c6c961cb4af…

MALICIOUS

PDF

45.3 KB Created: 2020-08-07 13:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f699977530afa179066adafc6b5c90c SHA-1: 78738d3112e3f72fc39ceadff3beb13a0e5f6ae9 SHA-256: abd93c6c961cb4af6a11372580375630d8dd0b27fb5be2310c13c215b9602144
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=walmart+assessment+test+answer+key+pdf'. The document body, though heavily obfuscated, appears to be a lure related to a 'Walmart assessment test answer key'. The presence of a link farm suggests an attempt to distribute malicious content or phish for credentials. The file was generated by wkhtmltopdf, a tool often abused for creating malicious documents.

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=walmart+assessment+test+answer+key+pdf
    • http://files.fortdavisalabama.com/uploads/1/3/1/4/131453574/fagemavaxuvotewofu.pdf
    • http://files.sherconresort.net/uploads/1/3/0/7/130740492/e31e1905fa9f.pdf
    • http://files.daankahmann.com/uploads/1/3/1/4/131482926/tazeteje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakuxosisubesabemobaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/4604905751.pdf
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/39193834395.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0429/0753/3475/files/36859921713.pdf
    • https://cdn.shopify.com/s/files/1/0429/3433/7695/files/4575871876.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/biology_notes_form_3.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/janobetenepafuludozidep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rewosegukedisupagur.pdf
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/17784076319.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/digital_painting_in_photoshop_industry_techniques_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/gemubuvixatozagamuzotib.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5990/files/animal_adaptations_worksheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000668a.bin
284a7268d2121b8920f463fb8c57919fb4ca318515e8898077211f2ce4e331ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x668A 5088 bytes
font_01_sfnt_off000077d6.bin
fec4e296cdf54709a14687f8372e6b357e02fbc23376105719cb9c7cb4dce0bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x77D6 10040 bytes
font_02_sfnt_off00009a03.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A03 4324 bytes