Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6194b239f55989…

MALICIOUS

PDF

42.9 KB Created: 2020-08-14 04:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0d5f208199c628c52902fb7709df074 SHA-1: 102e9bceb967ec3f41f77fceb6a961ef8de0e803 SHA-256: 3d6194b239f5598947cf8fddae063cf40b282c383f995d3f784876068b369745
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This indicates the document is designed to lure users to a potentially harmful external site. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which are hosted on 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of a malicious intent, likely for phishing or malware delivery.

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=kangaroo+jack+imdb+parents+guide
    • http://files.dukadance.com/uploads/1/3/0/8/130814055/82f2895ab83c6e.pdf
    • http://files.thedesigncaravan.net/uploads/1/3/1/4/131438541/8693208.pdf
    • http://files.lesmagnoliashotel.com/uploads/1/3/2/3/132303378/5727235.pdf
    • https://cdn.shopify.com/s/files/1/0431/8612/7009/files/refixirawovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/mowubopudupap.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/50965339565.pdf
    • https://cdn.shopify.com/s/files/1/0452/0670/0183/files/reliability_of_research_instruments.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4409/files/xesajizoton.pdf
    • https://cdn.shopify.com/s/files/1/0428/2905/4118/files/64887492444.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5815/files/dotties_weight_loss_zone.pdf
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/dufaziluzopiju.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/48099619143.pdf
    • https://cdn.shopify.com/s/files/1/0432/9970/0889/files/293663146.pdf
    • https://cdn.shopify.com/s/files/1/0440/8115/2152/files/html_skeleton_code.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/legio_estrangeira_clarice_lispector.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/pijimagamovaxikepejavuwu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/33109227614.pdf
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/fofur.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_off00006833.bin
06bc5c4fa90f206520a7714326ad9c5a849c9209764b0192b20774e793bc0faa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6833 5608 bytes
font_01_sfnt_off00007b34.bin
34ada1b46085a8fb2a9612edcc9ba9bed6f3a6771d0df309b584b27608414b75
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B34 10468 bytes