Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40742406ff85497…

MALICIOUS

PDF

50.5 KB Created: 2020-08-14 08:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3d0b1869c15bb1f0001fe4cb2efc0d1 SHA-1: b8a42692898ea0882d34ad8c5e63ff2dbea1eeba SHA-256: d40742406ff85497f36610aaa87e43874de5690062add32c5b129b13b5dd13da
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 links to external PDFs hosted on domains like cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The embedded URL in the document body, 'https://ttraff.com/wb?keyword=libro%20fausto%20goethe%20pdf', is the primary indicator of malicious intent, likely serving as a lure for further malicious activity.

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/wb?keyword=libro%20fausto%20goethe%20pdf
    • http://nevatonot.waytoomuchstuffintheattic.com/uploads/1/3/0/7/130776661/liloza.pdf
    • http://towiral.internalpipetech.com/uploads/1/3/1/0/131070450/vuposu.pdf
    • http://files.vinoetamicis.com/uploads/1/3/2/7/132740480/ravetekeve.pdf
    • http://files.denysebridger.com/uploads/1/3/1/1/131164097/jobumaxodute-zujanu-mosupuzulazivi.pdf
    • http://files.blackandbrownarebeautiful.com/uploads/1/3/0/9/130969731/150ea7814.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1562/files/suvanapofafuxapepumot.pdf
    • https://cdn.shopify.com/s/files/1/0435/5706/0769/files/general_characteristics_of_phylum_arthropoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/jonodefazuparemabanuxuvod.pdf
    • https://cdn.shopify.com/s/files/1/0432/0903/1840/files/sda_hymnal_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/mapa_topogrfico_de_angola.pdf
    • https://cdn.shopify.com/s/files/1/0437/5232/5272/files/bebeva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdf
    • https://cdn.shopify.com/s/files/1/0439/1511/6696/files/fenezemagaxezopu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/11805491093.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8136/files/mojobunerux.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/sijujeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0181/files/zusititesipese.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_off000085cf.bin
2e4e8cb18bbf1bfafb63b2e079f28e92f8bd9eaacd338617a5361778bf64fe1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x85CF 5352 bytes
font_01_sfnt_off000097f1.bin
cbdad1d96d78e20e38ab98e0b24f6e2d26dc742d2ac5dd2e178f2592a4dfb93c
pdf-font-stream PDF embedded font (sfnt) at offset 0x97F1 11192 bytes