Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7702086174163c…

MALICIOUS

PDF

58.6 KB Created: 2020-07-21 17:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 062be4544680bdb87a73e9cf9e105c86 SHA-1: 930fce88386ace76863768c169a3000f8f74cccf SHA-256: 9c7702086174163ce52a677e8ca75af3fb833b334ecfbb80f83c4827452a4264
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, directing users to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external resources, including a prominent link to a Shopify domain. The ML classifier strongly flagged this PDF as malicious. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious links as legitimate content.

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.cc/wb?keyword=music%20notes%20and%20values%20worksheets
    • http://files.milwaukeecharteradvocates.org/uploads/1/3/1/4/131452840/fekobagedetip-rujegajobe-tibuz-zubonafanewuwi.pdf
    • http://files.spanishrecipeswithsofia.com/uploads/1/3/2/6/132683400/6715647.pdf
    • http://files.marieliterary.com/uploads/1/3/1/8/131871977/gomajapinoj.pdf
    • http://files.northumpquariverhouse.com/uploads/1/3/0/7/130740260/gezuwadili_vipug_jogofejasefiwu_falamobetuvid.pdf
    • https://cdn.shopify.com/s/files/1/0441/2493/0200/files/86790735741.pdf
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/68644980337.pdf
    • https://cdn.shopify.com/s/files/1/0430/8529/9874/files/99871916534.pdf
    • https://sekugonizavo.files.wordpress.com/2020/06/56971960908.pdf
    • https://koxopovobepe.files.wordpress.com/2020/07/fadinirod.pdf
    • https://fakenigali.files.wordpress.com/2020/06/7753163780.pdf
    • https://xakovuwer.files.wordpress.com/2020/06/duderurazukugokilokufof.pdf
    • https://wubigixetoso.files.wordpress.com/2020/07/xinitafefi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4663/3621/files/subunexeruwituze.pdf
    • https://cdn.shopify.com/s/files/1/0435/8628/9832/files/98156685817.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3840/files/xikolub.pdf
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/24429402689.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/73397621594.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/sikigularufofalom.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6006/files/60026954112.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/25994128987.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_off0000a93d.bin
3443ae2e66c2a092ff0d2a814cde6824f96efd7b8110da63369e3254129c4a13
pdf-font-stream PDF embedded font (sfnt) at offset 0xA93D 5128 bytes
font_01_sfnt_off0000bab9.bin
ee83d6b1b0abb1c839c555b75460fb0f4e13fe55400431bf58b3f3deeb5a0d2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB9 10028 bytes