Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86405c96e3bf4f4…

MALICIOUS

PDF

38.6 KB Created: 2020-08-08 10:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06dc8e44a872a38fbf7f2f98e5cdfee4 SHA-1: e048973fde0c3147d8796d1afeff694185b8c874 SHA-256: e86405c96e3bf4f40979bb694ab24ef52e9cec4957777e5ed844c629d47a1eef
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 `https://ttraff.com/pify?keyword=clinical+sports+nutrition+pdf`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on `cdn.shopify.com` and other domains. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the target URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

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=clinical+sports+nutrition+pdf
    • http://files.uclachatpd.org/uploads/1/3/2/3/132303205/8765450.pdf
    • http://files.tcpmagic.com/uploads/1/3/0/7/130776779/5723175.pdf
    • http://joxofid.stevepeckfabrication.com/uploads/1/3/1/6/131637016/wunazometep-loxivirinufa-dafawovurif-wigeteruweko.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/alagappan_medicine_book_pdf_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/dupupemufuxoboriwijuveba.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/wusesifezeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/4373/4172/files/aisc_14th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/75201858296.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4490/files/69075240332.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/zetamavojipuse.pdf
    • https://cdn.shopify.com/s/files/1/0437/1808/2709/files/worship_keyboard_chords.pdf
    • https://cdn.shopify.com/s/files/1/0449/9256/1310/files/linfadenite_mesenterica_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42820491308.pdf
    • https://cdn.shopify.com/s/files/1/0436/0952/2339/files/allah_names_99.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/zuludokavovaw.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_off00004a59.bin
02706f1fffbff93bae7b4310f579966a6124bec1f7377f1f3770180f667d8eaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A59 4936 bytes
font_01_sfnt_off00005b1a.bin
863cfaac9e21606fdb3eae243282e23eaa8e23bf0368cac7490727c66555d293
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1A 10264 bytes
font_02_sfnt_off00007dcd.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCD 4324 bytes