Malicious PDF — malware analysis report

Static analysis result for SHA-256 2082d5113223bdbf…

MALICIOUS

PDF

48.2 KB Created: 2020-08-12 09:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a098278c96eb2d3ef4167d1447759653 SHA-1: 25e3ce93bb3beb466883c9835929b904cc30bfea SHA-256: 2082d5113223bdbf3888332c2722ddc753e7caf365b78ec794d67e56cd03a285
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'. This URL is embedded within the document's content, which appears to be a lure related to 'benzodiazep ic os intoxica o pdf'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector is likely a user being tricked into clicking the malicious link within the PDF.

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=benzodiazep%25C3%25ADnicos+intoxica%25C3%25A7%25C3%25A3o+pdf
    • http://files.merebrookllc.com/uploads/1/3/1/3/131383251/ruvatoke_sokirijibe_roxiwogam.pdf
    • http://files.daniellessweettreats.co.uk/uploads/1/3/0/7/130775629/jajutedabavesaju.pdf
    • http://vaseleb.bhawkeyephotography.com/uploads/1/3/0/8/130814328/levus_ritukovidu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1510/8765/files/91575339416.pdf
    • https://cdn.shopify.com/s/files/1/0432/8688/8612/files/funigofuxosizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/zebinubipisalufoxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/23173657078.pdf
    • https://cdn.shopify.com/s/files/1/0437/8676/4446/files/13121141510.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/77638911070.pdf
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/mekuruxikegewawita.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/51535471157.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/50033253767.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/bill_of_rights_uk.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9561/files/pelifafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/analogias_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/carnatic_music_basics_theory_in_telugu.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_off00007a4d.bin
c11697267c3858599d1726eecc92bddc560b5ea8523586e07ca499f5636b2d6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4D 5740 bytes
font_01_sfnt_off00008d21.bin
5b94965a89b4aa822e1704ee0aad24b853706d4d93c15aa7f87398afec5552c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D21 12024 bytes