Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f40fa506648ffdb…

MALICIOUS

PDF

40.8 KB Created: 2020-09-07 12:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ec73258e621d74edff31f93378ebdc4 SHA-1: 30afe2e4f8cc232bbd67e3592d6875db8b627abe SHA-256: 9f40fa506648ffdbea2966c84abea17d2c43c55a6e6eb64cb37f9a4f6494412d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting PDF files. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which is used to obscure the final destination. The document body, though heavily corrupted, contains the URL that triggered the malicious redirector heuristic. This suggests a phishing or scam attempt leveraging SEO-optimized PDF lures.

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.link/wix?keyword=phonics+sounds+a+to+z+pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/98476267328.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/lujekimotoramobajexijit.pdf
    • https://cdn.shopify.com/s/files/1/0439/5322/5883/files/fepurukitot.pdf
    • https://cdn.shopify.com/s/files/1/0432/4337/2699/files/satoshi_mines_bot.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/tadafitizuxezozefa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/case_in_point_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0663/files/criptogramas_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/19212035945.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/play_cabal_online_on_android.pdf
    • https://cdn.shopify.com/s/files/1/0464/7436/3048/files/80686806320.pdf
    • https://cdn.shopify.com/s/files/1/0440/7823/5798/files/steam_launch_options_windowed.pdf
    • https://cdn.shopify.com/s/files/1/0432/5159/7480/files/50252281368.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/nevasizexasitukimasa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/air_washer_maintenance_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/xuviresokujusuzupazin.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_off0000617b.bin
e3046360dc50aa4de7e7367b47c04e6eb864878fc4eecc6da3850740b1d980a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617B 5168 bytes
font_01_sfnt_off0000731d.bin
ce7c2d53db27e4a26aa790e371887576faa930c369e9b696844afbbbef91bd3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731D 10360 bytes

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