Malicious PDF — malware analysis report

Static analysis result for SHA-256 4357df318a1158d9…

MALICIOUS

PDF

43.9 KB Created: 2020-09-12 11:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2cc4a08f2d559dd1709724c3facdbfa1 SHA-1: 6a077302aa9867e4fc62f602d9633257daf90c60 SHA-256: 4357df318a1158d915cc5b57a442c7c862109fc634a34a18fb1fd1b6eddae6d2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.link/wix?keyword=axon+7+mini+user+manual`. It also exhibits characteristics of a PDF link farm, containing numerous external links. The document body, though heavily obfuscated, contains references to the lure URL and other PDF links, suggesting an attempt to drive traffic to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.link/wix?keyword=axon+7+mini+user+manual In PDF document text
    • http://kodiwero.myersmarinedivision.com/uploads/1/3/1/4/131438641/sudun-muvabukos.pdfIn PDF document text
    • http://files.thefeltfactory.co.nz/uploads/1/3/0/7/130776841/xizixexa-dajawotubep-fekifomidele.pdfIn PDF document text
    • http://files.safedriving.com/uploads/1/3/1/4/131406060/57040d899.pdfIn PDF document text
    • http://tofut.bo-co-wandering.com/uploads/1/3/1/4/131438464/8042031.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/8b9728_4b46e76af5c14622b7f8b5327d97f52a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a98ecc_1dcca3dce88a49b796e6252eab76ca73.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/89602e_efa81e57fc814386a5dd4dd2922238fa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/7404028763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9114/4088/files/15016338105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8618/3577/files/formal_dresses_australian_boutiques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/42425103366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/ratos_ab_annual_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/blue_tick_instagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9095/8752/files/tetrads_form_during_synapsis.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFF 3724 bytes
SHA-256: 5f506f96885c68285abb08013964e969243e5a1cdb180af6bb27fe8127c8fd8a
font_01_sfnt_off00006c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3C 4968 bytes
SHA-256: cbbd1a051d135eaa2b21307fb1c2adb38f29667f9878ecc853897d59e849a270
font_02_sfnt_off00007d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D12 10248 bytes
SHA-256: aa530c225b4893174d951723cd50462858433915b31e1397443add35c16c2d6b