Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f30b3f2848ea867…

MALICIOUS

PDF

52.1 KB Created: 2020-08-24 20:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4179e9c8214afee8418e9678d3b524d SHA-1: 9f3891cb590b1c4d7684cadbc877b4b63b2ba8ba SHA-256: 3f30b3f2848ea8671387e7474d172180f042743f0edf49f7397e648202aa0b5d
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The primary malicious URL, 'https://ttraff.cc/pify?keyword=best+antivirus+software+free++for+laptop', is designed to lure users by promising antivirus software information. The document body, though heavily obfuscated, contains references to this lure and other embedded URLs, suggesting a coordinated effort to drive traffic to malicious sites. The ML classifier also 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.cc/pify?keyword=best+antivirus+software+free++for+laptop
    • http://files.bestcprseattle.com/uploads/1/3/2/3/132302859/4922287.pdf
    • http://files.haptotherapiekoningsweg.nl/uploads/1/3/0/7/130738850/falotiver-joruxapobegum-gunixodow.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5912/files/bijotuxulesukena.pdf
    • https://cdn.shopify.com/s/files/1/0440/7446/7478/files/oxford_dictionary_english_to_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2402/1664/files/budget_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7786/9476/files/fotav.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/82133168239.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/phonics_flashcards_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0462/4138/2560/files/tumuvewuju.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/central_cabinet_ministers_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/babemimew.pdf
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/48705175093.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_off00007f81.bin
d308f12c1d2439b29c711b727572b05b56cc95f743a37cad5223c849e5e394ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F81 4976 bytes
font_01_sfnt_off00009095.bin
67b817ba3479efc25e13af9c565f66b9e924a73e56ac87faf41d43858d3e580f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9095 10704 bytes
font_02_sfnt_off0000b515.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB515 4324 bytes

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