Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5de281025b5961…

MALICIOUS

PDF

40.4 KB Created: 2020-08-19 08:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b92aadd2e217d803e5d4e225f8fc77fd SHA-1: a0546ed0bf1716c4bc04bbbdc414cb2f2fb7707c SHA-256: 4b5de281025b596141524b61dc706cf9ad0b7c32f9b2a8d6c704059834300924
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link to a known malicious redirector, ttraff.com, disguised as a bodybuilding workout chart. This redirector likely leads to a malicious payload or phishing page. The PDF also contains a link farm pointing to numerous other PDFs, many hosted on Shopify, which is a common tactic for SEO poisoning to drive traffic to malicious sites. The ML classifier strongly flagged this PDF as malicious.

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=bodybuilding+workout+chart+for+beginners+pdf
    • http://dodib.gocprny.com/uploads/1/3/0/9/130969762/wabewoxobid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78682713185.pdf
    • https://cdn.shopify.com/s/files/1/0436/4982/6969/files/butterfly_valve_tozen.pdf
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/wopawutizigaverobepibux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wozofedotomutigetipire.pdf
    • https://cdn.shopify.com/s/files/1/0440/0198/4662/files/20668126306.pdf
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/zidiwej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55628578329.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4404/files/87649496379.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/ps3_gta_5_mod_menu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1675/7154/files/s._mzstatic._com_e2_80_9d.pdf
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/55885158409.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_off00005dd7.bin
2b04abe0de8fbee49bebc3d16ff1c8c05d94434202eb610de3f8fffd1819f6bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD7 5864 bytes
font_01_sfnt_off000071dd.bin
5367fef50ff203621d8aa9e8544aa5c4b58e86729c40cd1ca508a58e25b7e827		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DD 10268 bytes

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