Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f006ccd449f0e7…

MALICIOUS

PDF

41.1 KB Created: 2020-08-24 22:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 676cc3781ba2558b7d94dbb36a38df8a SHA-1: 9da42096f35301f59ce7b76e9c1b0c08ea82b904 SHA-256: 83f006ccd449f0e79cccfcd2d8b292c4bd1721b014df088a799fb80ea70ddbaf
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at https://ttraff.cc/pify?keyword=mysql+workbench+guide+pdf. The document body, though heavily obfuscated, contains references to 'mysql workbench guide pdf', suggesting a lure to disguise the malicious intent. The presence of a link farm heuristic further indicates an attempt to distribute malicious content through seemingly legitimate-looking 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=mysql+workbench+guide+pdf
    • http://files.drusslaw.com/uploads/1/3/1/3/131380687/webuxugekofeles.pdf
    • http://files.friendsofthefergusonforest.ca/uploads/1/3/1/4/131407980/siref.pdf
    • https://cdn.shopify.com/s/files/1/0433/4875/4600/files/laudate_dominum_mozart_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0440/2459/4597/files/56306772076.pdf
    • https://cdn.shopify.com/s/files/1/0431/3759/7591/files/82217204789.pdf
    • https://cdn.shopify.com/s/files/1/0465/1584/7326/files/65765159168.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/gosilugapuwugulufomumukif.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/lobavapevubunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/conduct_disorder_journal.pdf
    • https://cdn.shopify.com/s/files/1/0437/5232/5272/files/law_abiding_citizen_movie_in_isaimini.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/73029487294.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/limewatakepejiladibubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6852/2657/files/defensa_siciliana_dragon.pdf
    • https://cdn.shopify.com/s/files/1/0437/7772/0469/files/beautiful_boy_book_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/bujivurumijepututigupobib.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_off000060dd.bin
f22393600ed4b436d852f55d34b363f5aaabcd70490a395722798a65ef9214c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DD 5736 bytes
font_01_sfnt_off00007479.bin
14fd38ec6b6f940bc5d24dce6f3c78cd8640a181f971424240c2b8f52b1c0258		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7479 10256 bytes

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