Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4830c6f8d38ce85…

MALICIOUS

PDF

42.6 KB Created: 2020-09-03 01:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 864661f665e23b108f601054c2b86752 SHA-1: 168df827857304e11af4d70ffbf55dff5e718032 SHA-256: c4830c6f8d38ce85cb1a864eb1b7604b10216bb0445ef2365cedfc6b7ea36d5c
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to a known malicious redirector, specifically ttraff.com, disguised with a search engine optimized keyword. Although the document body is heavily obfuscated, the presence of this malicious link and the PDF_SEO_LINK_FARM heuristic strongly suggest a phishing or malicious redirection attempt. No scripts were extracted from this sample.

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.com/wix?keyword=fraction+worksheets+for+6th+grade+printable
    • https://static.usrfiles.com/ugd/ab922d_26c9a1bee3e4425e97c945b0ef56e549.pdf
    • https://static.usrfiles.com/ugd/b8c837_2803fc05dab84343b08fa42b98065201.pdf
    • https://static.usrfiles.com/ugd/b8c837_07678323f78b4d569390d06684eff081.pdf
    • https://static.usrfiles.com/ugd/d13e1f_833247cca9b54c219e3b614ea9b56022.pdf
    • https://cdn.shopify.com/s/files/1/0441/1850/7672/files/separate_pages_adobe_acrobat.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/ascomycete_fungi_of_north_america_a_mushroom_reference_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_d99d9feb1f144681b9db795ef12f9348.pdf
    • https://static.usrfiles.com/ugd/f65518_83b6918135904d9aacbd47ac414318cc.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_off000063a9.bin
dba3a7fca4a0806f2031c80cbe28567b0d0d6eb2049ec3be752200d398ce4b14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 5824 bytes
font_01_sfnt_off00007788.bin
dcd3db956d1b6423b36a516f3dca2edce45c4b148bc6894a7e9764c6b7fa872b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7788 11196 bytes

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