Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbc4d4e40e06b6d…

MALICIOUS

PDF

45.1 KB Created: 2020-08-28 09:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9157c8968876fe53447f10a30573da73 SHA-1: 807cb51d46ef999e378ea047210a7035bd2e879f SHA-256: 8fbc4d4e40e06b6d79a2c1c94ae379f59af57c1b9545c6f020f89fdfd966ce33
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a string that appears to be a movie title and a URL, suggesting a lure for users to click on malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=captain+marvel+1234movies, which is likely used to redirect users to a site hosting malware or phishing content. The presence of numerous other PDF links, many pointing to Shopify, indicates a link farm strategy.

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=captain+marvel+1234movies
    • http://files.threecreekaussies.com/uploads/1/3/2/7/132710655/sujut.pdf
    • http://nuxad.vickiegeorgecounseling.com/uploads/1/3/1/4/131453501/9221788.pdf
    • http://files.bigmountainrun.com/uploads/1/3/1/8/131856519/tenimesomazelin.pdf
    • http://putewobo.gfreegenius.com/uploads/1/3/0/8/130814328/wafiwapoxoj-zumukexu-voribojuge.pdf
    • https://cdn.shopify.com/s/files/1/0436/6820/9817/files/97876202497.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jamitaribigonekadori.pdf
    • https://cdn.shopify.com/s/files/1/0435/4356/0346/files/google_docs_spreadsheet_functions_vs_excel.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4101/files/xotarakonip.pdf
    • https://cdn.shopify.com/s/files/1/0436/1001/3853/files/rereforukuwadi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0377/1041/files/mupisajazo.pdf
    • https://cdn.shopify.com/s/files/1/0447/3788/8410/files/nios_assignment_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/9764/4449/files/bengali_letter_writing_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/2045/0972/files/xanusuruwijotad.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/wamamemezobemu.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_off000072e0.bin
256965675f4c0dab27842829e094141bf1373fef676d99d29bac76d6276b8850		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E0 5368 bytes
font_01_sfnt_off00008519.bin
9b87c9ee1bf75bd838b34581ee885b37f42d115196255552ec9bfe7f80f159ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8519 10172 bytes

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