Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ccc4d6fb42f02e5…

MALICIOUS

PDF

39.2 KB Created: 2020-08-20 04:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c33758427caff5969e9319005a317984 SHA-1: b0957be6cd4d401324ff1b21472783975b20e6cc SHA-256: 8ccc4d6fb42f02e5be678b05d7783ca33a9b28e0eaa349fbc10ca32deef6fe9e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One such link, 'https://ttraff.ru/pify?keyword=baal+veer+1061', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and URLs, further supporting the malicious intent.

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.ru/pify?keyword=baal+veer+1061
    • http://files.ornamentsofexpression.com/uploads/1/3/1/4/131455883/vojosa.pdf
    • http://zamore.peer-cell.org/uploads/1/3/1/1/131164211/geduwanijupuxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/96839988745.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8664/files/4766826958.pdf
    • https://cdn.shopify.com/s/files/1/0461/1997/7124/files/27952940356.pdf
    • https://cdn.shopify.com/s/files/1/0429/6913/7305/files/jevamefifitawubi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1405/2247/files/apply_magic_sauce.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9970/files/76536174895.pdf
    • https://cdn.shopify.com/s/files/1/0454/9050/3832/files/obligationenrecht_schweiz_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/power_system_analysis_stevenson.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12086745869.pdf
    • https://cdn.shopify.com/s/files/1/0435/9336/7710/files/66712576396.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_off00004ec0.bin
c24fd5d25b92d5546967263424508660549bc4e756a15b8a9f07d73b98ae5253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC0 4956 bytes
font_01_sfnt_off00005fb1.bin
1dfb513069d216d40af79e937b41f62210c9a6508cf4f2eb8e0253ab567037fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB1 10300 bytes
font_02_sfnt_off00008332.bin
8493a4df727add9472bbe3e87cdd12b8607df2664168f45be9971c7637c991c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8332 3444 bytes

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