Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f023ab63354f8a…

MALICIOUS

PDF

60.0 KB Created: 2020-07-21 17:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2c5fe66cfe2045cb9bfd92197228294 SHA-1: 567b9a9911b3695437cf3b628acc165df7f7e608 SHA-256: f6f023ab63354f8a002612894681880c794796e2c157c68dae6d78ef65d95d81
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. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated and appears to be largely binary data, preventing a clear understanding of its content or intent beyond the malicious redirection.

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=karel+%25C4%258Dapek+rur+pdf
    • http://files.jeremylepisto.com/uploads/1/3/1/4/131407284/popure.pdf
    • http://files.acharlotteweddingminister.com/uploads/1/3/2/6/132681053/6017202.pdf
    • http://files.mrpsocialstudies.com/uploads/1/3/2/6/132696112/3623965.pdf
    • http://files.snowangelsiberians.com/uploads/1/3/1/3/131379724/zejamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1646/2229/files/94560973915.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/wodelibuwirirosirukeko.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5687/files/23210508335.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/nasobisunolubavuwewez.pdf
    • https://winasetuto.files.wordpress.com/2020/07/48288955265.pdf
    • https://juleweviv.files.wordpress.com/2020/06/samodefobejamipelodupog.pdf
    • https://goxikuraz.files.wordpress.com/2020/07/wujero.pdf
    • https://vunafafop.files.wordpress.com/2020/07/metumitabo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/56837538627.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/xirefevexuzogikosup.pdf
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/70011017196.pdf
    • https://cdn.shopify.com/s/files/1/0436/5815/0046/files/rokumepekidipadivaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/nuzavebon.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/87778596694.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_off0000acf5.bin
19e514a2642fd08c8c21cdf077dedef388d156188b46e9017a2fd7fbf5798756
pdf-font-stream PDF embedded font (sfnt) at offset 0xACF5 4572 bytes
font_01_sfnt_off0000bc95.bin
38c67c82c8b0cf9ccd3d3a6b4306ff48f1b1b89cf1e57402c3c0ffcef2d2260c
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC95 10804 bytes