Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d6a2fecfee6d4e…

MALICIOUS

PDF

46.8 KB Created: 2020-08-24 22:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 887b8fb5385d023bfb9a60a387e54b52 SHA-1: 675f97414010592db41c59071421d6515030d76c SHA-256: 20d6a2fecfee6d4e917968b6c8d755847c1d5aa4b139d3bb4d4dc55af519dcd8
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=engineering+sciences+data+unit+design+guide, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to a malicious site disguised as a design guide. No scripts were extracted, but the presence of a malicious redirector indicates a phishing or content-luring attack pattern.

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=engineering+sciences+data+unit+design+guide
    • http://zekokif.goldenreiki.co.nz/uploads/1/3/1/4/131438304/dorebevofejinezeg.pdf
    • http://senizedo.cynthiagauthier.com/uploads/1/3/1/6/131637308/pejuzunovi-pegonuvavizaxe-dexafupozegova.pdf
    • http://medit.thecut.studio/uploads/1/3/1/4/131438641/81ec774eb8.pdf
    • https://cdn.shopify.com/s/files/1/0433/8132/5987/files/fovazujalutagereziji.pdf
    • https://cdn.shopify.com/s/files/1/0435/0997/3147/files/68246437149.pdf
    • https://cdn.shopify.com/s/files/1/0434/6052/6246/files/macroeconomics_jones_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/2342/3912/files/firus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9589/files/1426326302.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/9375818080.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/fuerzas_intermoleculares_e_intramoleculares.pdf
    • https://cdn.shopify.com/s/files/1/0434/1560/1319/files/96269642150.pdf
    • https://cdn.shopify.com/s/files/1/0430/7520/7322/files/petta_audio_songs_com.pdf
    • https://cdn.shopify.com/s/files/1/0430/4424/1557/files/basic_spoken_english_course.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006363.bin
08e4d4fa5ca1557b7173e928f68a501f12d75efe633670486f3415bef7ad1945		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6363 5032 bytes
font_01_sfnt_off0000748c.bin
14662f6b7009f77f374c839ea0ba8ce658aae09c4d05513df78c976f4cad4791		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748C 10640 bytes
font_02_sfnt_off00009932.bin
f0a8b786da721c7415a59d91fbce3b20bbb98ea32e48857ac1ff22d53b00ec29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9932 16144 bytes

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