Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b69b97e5abbb8f…

MALICIOUS

PDF

49.8 KB Created: 2020-08-25 16:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1851eb15b30776cbf0db7f5dbf126fe SHA-1: a68fd50669d61020deaaf8e7147e647577ec6655 SHA-256: f6b69b97e5abbb8f7ee009c502641ac1c87fbe08b50d1b5f45da6c1d5a55e554
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to ttraff.ru, which is designed to lure users into clicking on what appears to be a font download. The document body, though heavily obfuscated, contains the target URL and mentions 'calibri font for photoshop', reinforcing the lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning to attract victims.

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.ru/pify?keyword=calibri+font++for+photoshop
    • http://files.stmaryspontiac.org/uploads/1/3/0/7/130740255/seketimar.pdf
    • http://files.nualacenter.com/uploads/1/3/2/3/132302833/9425441.pdf
    • https://cdn.shopify.c
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/netimijubisoze.pdf
    • https://cdn.shopify.com/s/files/1/0432/6483/5737/files/417470676.pdf
    • https://cdn.shopify.com/s/files/1/0450/3319/3622/files/gallbladder_operation_video.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/37991802953.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/zefeleviduja.pdf
    • https://cdn.shopify.com/s/files/1/0465/0110/1720/files/43779554634.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/60766087114.pdf
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/67876777119.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4260/files/83198944334.pdf
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/vixenajun.pdf
    • https://cdn.shopify.com/s/files/1/0430/8097/4490/files/fewap.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/77266360156.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_off00007a40.bin
3ab9e717b798b52c000b6013756f362de2e352c0207c896af4cf709d202b81dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A40 5032 bytes
font_01_sfnt_off00008b50.bin
078844d48151a328e5358660d4bd42403452c4c5f8241c3c570a69c90492ef18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B50 14924 bytes

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