Malicious PDF — malware analysis report

Static analysis result for SHA-256 5395744aac1d1f0b…

MALICIOUS

PDF

42.2 KB Created: 2020-09-01 09:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aefe8e0ea448937111d15be6b600598 SHA-1: 810f8ac1d9f7910657915be74992d4ffcfdcda78 SHA-256: 5395744aac1d1f0b5397692baf01daeaef93bc4d5bf184ccf22f948ae255ddda
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector and part of a link farm, with a low-severity heuristic for an invoice/payment lure and a call-to-action button. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=loan+agreement+format+in+tamil', which is flagged as a known malicious redirector. This suggests the PDF is designed to trick users into clicking the link, leading them to malicious content.

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=loan+agreement+format+in+tamil
    • https://static.usrfiles.com/ugd/6846fe_145f5db959ac4952b6c7ddf51819b368.pdf
    • https://static.usrfiles.com/ugd/374ce0_3155438c77e9467584455a3327be76c2.pdf
    • https://static.usrfiles.com/ugd/278743_8bc0aab19f05460a823e2ca76c4ace53.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7b2be44753840888bbca63315dc089b.pdf
    • https://static.usrfiles.com/ugd/a2d007_d63a08c2c39d4b6aa7a61ba403a6c99f.pdf
    • https://cdn.shopify.com/s/files/1/0449/9036/5864/files/avant_browser_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0431/1757/6354/files/26965616125.pdf
    • https://cdn.shopify.com/s/files/1/0432/3413/2131/files/portuguese_to_english.pdf
    • https://cdn.shopify.com/s/files/1/0459/6934/2631/files/30115169135.pdf
    • https://cdn.shopify.com/s/files/1/0430/1016/2837/files/woguzojukumo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/64875497202.pdf
    • https://static.usrfiles.com/ugd/d01287_a94236f12f4a4fecbd039dd61efe7feb.pdf
    • https://static.usrfiles.com/ugd/a771bd_c96c16318f9f4d10b67e4b25cd91a026.pdf
    • https://static.usrfiles.com/ugd/fd7405_f73f25c6df6940179345a4dd53864454.pdf
    • https://static.usrfiles.com/ugd/b8c837_695ba211d7f043d898ec67f7cbd7a68f.pdf
    • https://static.usrfiles.com/ugd/837d34_087441009faa4f519269d10fa81e7f20.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_off00006774.bin
19ba57c3e45fdff0b4abb494d357e3d687106456600f1edbf40c9cbf6f3e85c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6774 4852 bytes
font_01_sfnt_off000077e9.bin
88b1aa1918c489495ea789945164eca53e87c1a8b1a0d8377e5853cd39505b79
pdf-font-stream PDF embedded font (sfnt) at offset 0x77E9 10692 bytes