Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab2f73c7e1f0805…

MALICIOUS

PDF

61.0 KB Created: 2020-07-09 17:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01a93d0eb6e75075d109adbae212ca5f SHA-1: 2388fd9a38857620801424e170edcf2bbf417566 SHA-256: dab2f73c7e1f08057413307c20149013e7eb15058ce8dfd6d40632a8a52bf9a8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/wb?keyword=order%20statistics%20joint%20pdf'. The document body, though heavily obfuscated, also contains this URL and other links pointing to external PDF files, suggesting a link farm or redirection scheme. The ML classifier strongly supports the malicious verdict.

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=order%20statistics%20joint%20pdf
    • http://files.duanebrownlaw.com/uploads/1/3/1/4/131483253/2887604.pdf
    • http://files.bondbailbonds.com/uploads/1/3/0/8/130814342/338a7897e32.pdf
    • http://files.kingfisherpbs.org/uploads/1/3/2/6/132681602/fbc377f49.pdf
    • http://files.thedressdivaonline.com/uploads/1/3/1/4/131437832/desidup-zuwopem-xekewuvoxobif.pdf
    • http://files.karaikudivoyage.us/uploads/1/3/0/9/130969427/setizazon_ragali.pdf
    • http://files.godswaytshirts.com/uploads/1/3/2/3/132302815/7c24d7928c8eda5.pdf
    • http://files.laucandrique-en.com/uploads/1/3/1/6/131606619/9202608.pdf
    • http://files.maraudersamstaffs.com/uploads/1/3/1/3/131384583/betevezusutejunubusu.pdf
    • http://files.authorrebeccaarogers.com/uploads/1/3/1/6/131637034/wakobobo_jujorufaxeso_puxul.pdf
    • https://vumutigul570287057.files.wordpress.com/2020/06/6015183049.pdf
    • https://bigovabazo.files.wordpress.com/2020/06/fomedezexak.pdf
    • https://rejukuvis.files.wordpress.com/2020/06/moraf.pdf
    • https://devuwawojari.files.wordpress.com/2020/07/96830461780.pdf
    • https://telezeguraka.files.wordpress.com/2020/06/kebinojapujurafarete.pdf
    • https://vigafekiwi.files.wordpress.com/2020/07/mitopusalixogokezoto.pdf
    • https://sobetolav.files.wordpress.com/2020/06/birupitosegima.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bijuwosozawubuvenokuzi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977390730.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b55.bin
4a716b180d0f12b816e8a6043b6cd88b81b61394393ab7251b76334511c52a53
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B55 5008 bytes
font_01_sfnt_off00009c6c.bin
5a4b0634151f97cc15f51f9d560fa6b1db1ed207ba567dcbdfa417b482878bae
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6C 16972 bytes
font_02_sfnt_off0000d17e.bin
32c80f323022e1ff67022c53ea7461d927fbe374988e3a3732005ad066018c71
pdf-font-stream PDF embedded font (sfnt) at offset 0xD17E 16204 bytes