Malicious PDF — malware analysis report

Static analysis result for SHA-256 24475594bab26c04…

MALICIOUS

PDF

44.4 KB Created: 2020-08-22 15:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb083d5d1bc4310ec2aae89ce627d36a SHA-1: 717cc277897872b42af6f454db945ce327117b5d SHA-256: 24475594bab26c04cf9ef448562bdf94c969ec6864a35f5e04499a6fcf6e8e0c
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of a link farm heuristic further indicates a malicious intent to drive traffic to external sites. 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.com/pify?keyword=bengal+tiger+telugu+movie+audio+songs
    • http://mosujar.chefzanderault.com/uploads/1/3/1/1/131163635/nuvabiditidefitu.pdf
    • http://mawazu.coldcreekdogtraining.com/uploads/1/3/1/6/131606289/7132150.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/28164065071.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/loribis.pdf
    • https://cdn.shopify.com/s/files/1/0430/9109/9805/files/android_checkedtextview_setchecked_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3541/files/watojoxeruxoluvarixeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/xumususunafojitajo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/xotekixuwipogasavajibisom.pdf
    • https://cdn.shopify.com/s/files/1/0435/3615/4773/files/14811582617.pdf
    • https://cdn.shopify.com/s/files/1/0454/4213/8262/files/nuvedapezajim.pdf
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/jafuwesefivapaji.pdf
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/53872810708.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/fapigeze.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28664871254.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/
    • https://cdn.shopify.com/s

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067ee.bin
26e28aa5afe3ca66c4165150dedda3b2fe2099b11e4c65e4d728f387dbb75fd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EE 5256 bytes
font_01_sfnt_off000079b7.bin
c6098ec699e6a1808f6368dc3246ebbdaf3f7d299aae0281cb1184bf79e2ccb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B7 13884 bytes

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