Malicious PDF — malware analysis report

Static analysis result for SHA-256 583c681cf438a7e5…

MALICIOUS

PDF

41.4 KB Created: 2020-08-15 04:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54c39999727c931d4b4c861441123336 SHA-1: 50cf28bf34622cb4e9ad1dfb1833871e1450c44a SHA-256: 583c681cf438a7e53f8c0491a9c28e604b4ffec1014be89613516f63620d4ad8
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a redirector URL that is known to host malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading a 'vcredist_x64.exe' file, suggesting a drive-by download or social engineering attack. The presence of numerous links, many pointing to Shopify-hosted PDFs, indicates a link farm strategy to obscure the malicious destination.

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=vcredist_x64.+exe+2018
    • http://desuroka.siblingarts.net/uploads/1/3/0/9/130969559/dugufotuguf_wefuxet_wokowu_niketediwi.pdf
    • http://jugojapit.midwestmusclebullyclub.com/uploads/1/3/0/7/130776760/7404094.pdf
    • http://jokudum.bremensoccer.net/uploads/1/3/1/0/131070786/fojekafiwita-fosal-gerifo.pdf
    • http://files.missouriinstituteofhypnotherapy.com/uploads/1/3/2/6/132695543/8275253.pdf
    • https://cdn.shopify.com/s/files/1/0434/5239/9777/files/carol_of_the_bells_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9788/files/witorogorefopaxetivujekeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/4106864177.pdf
    • https://cdn.shopify.com/s/files/1/0433/3004/4062/files/famukavanofana.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/wetedixezelatojusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7876/files/investment_appraisal_journal.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/1363852262.pdf
    • https://cdn.shopify.com/s/files/1/0435/3887/4532/files/77428721988.pdf
    • https://cdn.shopify.com/s/files/1/0435/9094/2888/files/gikofibatimipizoj.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_off000057bb.bin
317526a7e8bab11152e4ae1614ddacaa01a49ac1808bcaedd73d1d7613157dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57BB 5548 bytes
font_01_sfnt_off00006ad9.bin
9b10a875b3d1c569394a67c81f9fcde452694daeebf1cff9f372cf5214917c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD9 14784 bytes

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