Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c625050f3da2b9…

MALICIOUS

PDF

44.7 KB Created: 2020-08-26 16:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c141e6da77d0774b2a95cf67085747b1 SHA-1: f47090fea4f63b38166c962aa3baa3275392c58e SHA-256: 86c625050f3da2b91c047b4cac8c34ce0f21f3cd2b5c0152bd4dac0d66b73d33
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'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though partially corrupted, contains the same redirector URL and a list of Shopify-hosted PDF links, reinforcing the malicious intent. The primary attack pattern involves luring the user to the 'ttraff.com' URL, which is likely a phishing or malware distribution gateway.

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=wayfair+comment+pour+utiliser+%25C3%25A9tat+d
    • http://files.cleath-harris.com/uploads/1/3/1/4/131452989/5787096.pdf
    • http://pibarabob.exact-timing.com/uploads/1/3/1/3/131398252/tunexufizadoriwafop.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8229/files/kagumevinoliropin.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/kufomedofaku.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/jetisokasuditovupugoteti.pdf
    • https://cdn.shopify.com/s/files/1/0459/2707/1911/files/gekefuratebinadizifavaza.pdf
    • https://cdn.shopify.com/s/files/1/0460/2150/9279/files/18493477577.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5682/files/algebraic_expression_formula.pdf
    • https://cdn.shopify.com/s/files/1/0432/2692/3172/files/base64_string_to_android.pdf
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/jawuto.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/introducing_sociology_class_12_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/zegagerilujixesimozaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/zolewamad.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_off00006ab6.bin
f9894ef8a6c27733354083ee37b36d000086670013d5868db815ea331719b0b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB6 5556 bytes
font_01_sfnt_off00007d47.bin
36f0c1523cd8f2e1db3ec357b56c9101109795c3b098cdaa12b515bb2f4bde99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D47 12216 bytes

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