Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b7ff99c88fb218…

MALICIOUS

PDF

40.2 KB Created: 2020-08-05 06:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc57523ddb3f20d7e4e3a45fa854bd4d SHA-1: 6d3681120b60d11149795df9aa80840f4423fb00 SHA-256: d9b7ff99c88fb2188f3be0bb7ecde6ae520cec52039f428767934233abd9a5d4
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', disguised with a medical keyword. It also exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=manejo+de+angina+de+pecho+pdf
    • http://files.jungeunleecreative.com/uploads/1/3/0/9/130969003/2466834.pdf
    • http://files.jerryhilldesigns.com/uploads/1/3/1/6/131636916/79f9f4e61f69dee.pdf
    • http://files.piperdavisbaseball.org/uploads/1/3/1/6/131636642/648d4.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/68982481503.pdf
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/59119705955.pdf
    • https://cdn.shopify.com/s/files/1/0440/6080/3237/files/the_best_simple_recipes_americas_test_kitchen.pdf
    • https://cdn.shopify.com/s/files/1/0430/9588/3925/files/96302843525.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/54266332551.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/niwoxafefojifaruxalu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3749/files/zogafi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7659/1509/files/gupanokoxadaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/7459/2668/files/berliner_platz_3_neu_intensivtrainer_lsungen_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/77431152674.pdf
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/bimow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/midotikonujeriruzopa.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_off00005ecf.bin
b45cd7e06a4c3baf0038bb3d5535254f84aee55843162e98218db764ab5fe4d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECF 5192 bytes
font_01_sfnt_off0000709a.bin
20e5933aade76c784675d76052d6a1db3c22cea5d9769e7d0a2c136a1dd56298		 pdf-font-stream PDF embedded font (sfnt) at offset 0x709A 10512 bytes

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