Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f13d59a4cd1cd3f…

MALICIOUS

PDF

53.4 KB Created: 2020-08-25 05:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ce6072098120103e7419e7e2425ae7d SHA-1: d19c2fd6eeec7754b6aa1f8c99f5f999918d9f53 SHA-256: 1f13d59a4cd1cd3f669b5478555e354112be25525109cc905eb4f21736a186fe
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating it's a link farm pointing to a redirector. The primary redirector URL is https://ttraff.ru/pify?keyword=angular+form+group+array, which likely leads to a malicious payload. The document body itself is heavily obfuscated but contains references to the redirector and other URLs hosted on Shopify, suggesting a lure to obscure malicious content.

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=angular+form+group+array
    • http://lasososos.kirkistownprimaryschool.com/uploads/1/3/2/8/132814930/4705090.pdf
    • http://files.brouwerhomes.com/uploads/1/3/1/4/131407164/bd9bfbf24d00dcc.pdf
    • http://vegux.bermudabonfires.com/uploads/1/3/0/8/130813765/6200316.pdf
    • http://files.advbrand.com/uploads/1/3/2/7/132712163/fusekafowava.pdf
    • http://dafitu.thepleasureseekersmarket.com/uploads/1/3/0/7/130739726/fajozotofazenodexo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4813/2008/files/88023838081.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/63093568811.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/823401624.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/4199671391.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/23881048835.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1084/files/92647953798.pdf
    • https://cdn.shopify.com/s/files/1/0439/1341/2760/files/90195199896.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/zovusebuva.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/firofevolazilowowamedoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8536/4390/files/age_of_empires_2_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/tunumosizemekoki.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9439/files/gobeguwotupaj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000654a.bin
a8a21ec47f7c87b7627b501978e0499110583214789d45a34d68f36de892bcaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654A 5136 bytes
font_01_sfnt_off000076b4.bin
49f7e199df5117f1730bbd6a32a410d1c3dc15036acd52f5faab0a7bbcdb3051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B4 7436 bytes
font_02_sfnt_off00008fed.bin
3e47657a258998507cb807833dd2efbd1497859a384446e890b05600a9f8602c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FED 10296 bytes
font_03_sfnt_off0000b357.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB357 16036 bytes

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