Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd465dea81375706…

MALICIOUS

PDF

51.5 KB Created: 2020-07-31 03:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b176f643505f46e00894e34cc1b3a8f7 SHA-1: 32189aeb68e55bf8f74daef5c0c3f02aaca4cbe8 SHA-256: bd465dea813757063e24adebed27e3be60db34f8167d502cf823b2423bacb907
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic indicates a direct link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious documents. The overall pattern suggests an attempt to drive traffic 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=electrolysis+of+brine+pdf
    • http://files.localhomegrownmarket.com/uploads/1/3/2/3/132303229/lenix-kijobewafu-binakire-wetalevigu.pdf
    • http://files.entrepreneur-srilanka.com/uploads/1/3/0/8/130814106/sobajat.pdf
    • http://files.videopeople360.com/uploads/1/3/0/8/130874119/tikog_dakipeboki_wipexi_labigaba.pdf
    • http://files.festival-calendar.com/uploads/1/3/1/4/131482931/8510969.pdf
    • http://files.lacla.us/uploads/1/3/2/6/132680874/4308009.pdf
    • http://files.videopeople360.com/uploads/1/3/0/8/130874119/tiko
    • https://cdn.shopify.com/s/files/1/0432/6129/6790/files/jejixoli.pdf
    • https://cdn.shopify.com/s/files/1/0438/3778/4229/files/surikimudojepomux.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/dogureviju.pdf
    • https://cdn.shopify.com/s/files/1/0435/5178/5109/files/59661568194.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0154/files/dewagipojobido.pdf
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/70471736008.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/vixawibikew.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/pamor.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/15914109045.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/640091591.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/fipidudipeletito.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2323/files/kinisasoxuribabufeva.pdf
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/pekuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/57984473164.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/77732749614.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_off00008b65.bin
5e250e4c7bb1c7dfd75c4411af7a7596d8e0f1b33554813de90d2ec48a3182db
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B65 4924 bytes
font_01_sfnt_off00009c2b.bin
0ac3df263b71c4c35f54c712e2c0fa207c39b356c6b56a8af1c55908d1c7ecd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C2B 10692 bytes