Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2cbf24a6c10706…

MALICIOUS

PDF

40.6 KB Created: 2020-09-02 13:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b21c7d61f6b6641207ddac48adc5ecff SHA-1: 7a0fbe79214636a1537e22b9647426941a13bdd9 SHA-256: be2cbf24a6c10706708d736df11accfd3637cab8098f4a1e8e264a0a95be7f22
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=combobox+wpf+style+template', is identified as a known malicious redirector. The document body contains garbled text but also includes the same malicious URL and numerous Shopify-hosted PDF links, reinforcing the link farm and redirection attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=combobox+wpf+style+template
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/kabexefukuremukagore.pdf
    • https://cdn.shopify.com/s/files/1/0436/7941/6473/files/4776535129.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/lolesolemi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7989/1099/files/fopoxosopekagemeres.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/bilalawapipagaxigeso.pdf
    • https://cdn.shopify.com/s/files/1/0434/1180/0220/files/bush_pin_type_coupling.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/rujep.pdf
    • https://cdn.shopify.com/s/files/1/0433/3391/0681/files/48239883469.pdf
    • https://cdn.shopify.com/s/files/1/0444/3560/3623/files/tirezosewafupajozumodow.pdf
    • https://cdn.shopify.com/s/files/1/0435/3916/9429/files/17600658003.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5619/files/rinaxumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7616/4515/files/smith_and_wesson_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0690/files/recommendation_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/35836086709.pdf
    • https://cdn.shopify.com/s/files/1/0430/7707/5108/files/kpmg_brand_identity_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16949815227.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_off000057aa.bin
8f0918f9363219313ef5ce3efc83f7b953335cf883645c976bd9f16f5a04b950
pdf-font-stream PDF embedded font (sfnt) at offset 0x57AA 5256 bytes
font_01_sfnt_off00006996.bin
13a21bf0e58b7d5a1fe06b15d55696cb0f4a027c1cb83a0b26e9900be475bff5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6996 13932 bytes