Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e5b782aff92174…

MALICIOUS

PDF

46.3 KB Created: 2020-08-22 10:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d421fc73606f9b8d0b3bf0234ca8bfa3 SHA-1: 21aa6b45e756e45103bc5f7a2cabd2eacd697499 SHA-256: 26e5b782aff921741fd2913ebc26df34b03b91e9bdf45281a369d77eb7a0a696
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=new+buffalo+michigan+perch+fishing+report'. This URL is designed to lure users into clicking, likely leading to further malicious content or downloads. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=new+buffalo+michigan+perch+fishing+report
    • http://files.alexrawfootage.com/uploads/1/3/1/4/131437181/fagasafemaxed.pdf
    • https://cdn.shopify.com/s/files/1/0446/6756/8291/files/zeguwotibaxujixifugesebak.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/laboratory_report_writing_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8791/files/tufovuxitevevulipu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/14778572822.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/ag_barr_annual_report_2012.pdf
    • https://cdn.shopify.com/s/files/1/0436/4248/6944/files/janefuji.pdf
    • https://cdn.shopify.com/s/files/1/0464/5050/7944/files/edinburgh_castle_tour_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/2894/5819/files/ackermann_nurse_call_system.pdf
    • https://cdn.shopify.com/s/files/1/0451/1930/7929/files/ninepax.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/522003137.pdf
    • https://cdn.shopify.com/s/files/1/0430/2723/4969/files/rotanatutoligodowefipur.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3198/files/1816079294.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/jifozorirezajapo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7657/3601/files/34334645319.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_off000075b3.bin
e7f2f917e8a9ba016ef2211ff4016d06fc1bd57a5ab9ba4336ec59a76f72d47a
pdf-font-stream PDF embedded font (sfnt) at offset 0x75B3 5632 bytes
font_01_sfnt_off000088cf.bin
b79a602844c38c28a827ed697101ed044bacdca075cd89b75708b7f6f2824cde
pdf-font-stream PDF embedded font (sfnt) at offset 0x88CF 10472 bytes