Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6627c40fe86a33…

MALICIOUS

PDF

52.4 KB Created: 2020-08-21 16:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2267d48920dd120d9ca317bd6ef2e89 SHA-1: 641ede0339336a01df305e88e676b68cf3277152 SHA-256: 6f6627c40fe86a336cb1ce97054901ce05c969b830a35d75e6b106043b920c10
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and a list of other PDF links, suggesting a link farm or redirection scheme. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=developer+tab+google+sheets
    • http://lufuxaw.nataliehiningscenicdesign.com/uploads/1/3/0/7/130775309/gikodajobaxoderoxobo.pdf
    • http://files.northislandpag.com/uploads/1/3/1/4/131437701/jeloxikofilojojetuxi.pdf
    • http://files.ashengroundcc.org/uploads/1/3/0/9/130969148/mixunorenar.pdf
    • http://files.authorseanmacuisdin.com/uploads/1/3/0/7/130739427/nekuxetulobuwepinu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2156/5084/files/69453620776.pdf
    • https://cdn.shopify.com/s/files/1/0432/5376/0160/files/67657471989.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0454/7385/7686/files/blender_tutorial_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/5698/7303/files/fumejazatefubozap.pdf
    • https://cdn.shopify.com/s/files/1/0447/9280/7590/files/69875379323.pdf
    • https://cdn.shopify.com/s/files/1/0454/2873/6168/files/76388570885.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67264452348.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/42087136432.pdf
    • https://cdn.shopify.com/s/files/1/0433/1814/9285/files/48054903254.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f1d.bin
f358c9d6005b7bfa53021dc34d0a7faeb3bafe27e6eaad2286159594ba11a557
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1D 5280 bytes
font_01_sfnt_off0000a10b.bin
e75da9e4f198dc0e7df1c31207023fe092fe2dad045ec007669df7c6d5e5f7b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xA10B 10564 bytes