Malicious PDF — malware analysis report

Static analysis result for SHA-256 c552ec27386a24dd…

MALICIOUS

PDF

46.2 KB Created: 2020-08-13 22:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ffac187b976cb357d39db3967a1263d SHA-1: b18e480bfc7a495f165f6b2df3c7c88f91e95886 SHA-256: c552ec27386a24dd4e1ee1c49b838c4559128d7115716fd45976908f7b6beaf8
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `ttraff.com`. The document body, though heavily obfuscated, contains text related to 'Houghton mifflin 6th grade math answer key' and includes the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on `cdn.shopify.com` and other domains that appear to be part of a distribution network.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=houghton+mifflin+6th+grade+math+answer+key
    • http://wofuxejol.fropros.com/uploads/1/3/2/7/132710621/e3dbb1.pdf
    • http://defaral.rivron2.net/uploads/1/3/2/8/132814476/kixabafaromomokar.pdf
    • http://files.asbjorgdesignslandscapes.ca/uploads/1/3/1/4/131438847/7ba33ac58.pdf
    • http://files.independencegala.com/uploads/1/3/0/7/130776081/vewesemis.pdf
    • http://files.infieldconservation.com/uploads/1/3/2/8/132814050/83a992f01f.pdf
    • https://cdn.shopify.com/s/files/1/0432/5185/9616/files/jodopirimimaxuvivew.pdf
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/26295313224.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/newewagekezome.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/soporagixalari.pdf
    • https://cdn.shopify.com/s/files/1/0428/8570/9987/files/87143606256.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1341/files/87784375744.pdf
    • https://cdn.shopify.com/s/files/1/0438/2674/1405/files/battlemech_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0822/8508/files/57391498679.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/algebra_booleana_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/jujobivegubijelugamu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/mexorexezoponewefif.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_off00006645.bin
404c83937d2c5f86c358cb2b4b66f5c49f613e037d0cef269eb4070f133d1f20
pdf-font-stream PDF embedded font (sfnt) at offset 0x6645 5576 bytes
font_01_sfnt_off0000791c.bin
3904765c376cc5998b73e1deb7d27dd9ea6d4042456904fb8b7f80cd8245f5b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x791C 10552 bytes
font_02_sfnt_off00009d21.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D21 4324 bytes