Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6c2dd57c18a383…

MALICIOUS

PDF

49.4 KB Created: 2020-08-15 10:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 880005bbebbd9a2c0bba839ef20b2852 SHA-1: a7df35211741a453a947f3195c23ec7dc0d9a3f9 SHA-256: ad6c2dd57c18a38390d0725d9dae828d34af2fa085a3c2d42f25e5eada3a40c5
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate content, but the primary link redirects to a malicious URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the URL https://ttraff.cc/wb?keyword=complex%20numbers%20word%20problems%20pdf is part of a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains this same URL, reinforcing the malicious intent. The presence of numerous other PDF links suggests a broad attempt to distribute 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.cc/wb?keyword=complex%20numbers%20word%20problems%20pdf
    • http://files.amaartllc.com/uploads/1/3/0/7/130776077/67474a48e9eb.pdf
    • http://files.ellenjaudon.com/uploads/1/3/2/7/132710765/godawuxopowoj.pdf
    • http://nanusabe.exoticconfessions.com/uploads/1/3/1/4/131482975/b3df80defcb5a.pdf
    • http://files.someoneelsemovie.com/uploads/1/3/2/7/132740584/radamut_jogun_xeletop_bamevezuwuloti.pdf
    • http://vanixoxa.graphitedesign2.com/uploads/1/3/1/8/131872155/besiwebir.pdf
    • https://cdn.shopify.com/s/files/1/0430/9788/2773/files/wivifagozitesolirumik.pdf
    • https://cdn.shopify.com/s/files/1/0431/3455/0173/files/wimubologikiraralugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/84047424175.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/96940857588.pdf
    • https://cdn.shopify.com/s/files/1/0436/4127/4521/files/how_to_calculate_era.pdf
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/motion_with_constant_acceleration_problems_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/7818419087.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/26083161028.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/84646975303.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_off000076f6.bin
fe8527ea6dc37dc120d9a55a3941c25344721003621c035927cfd791ecd72a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F6 5180 bytes
font_01_sfnt_off00008888.bin
1d2cc08abedb18dbd2ce33713dbd178bf6295dbadb09dbd76c0653c2740e177b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8888 15412 bytes

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