Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb474fe5c00acd9…

MALICIOUS

PDF

43.6 KB Created: 2020-08-01 06:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a657a57481d6820a74fb93f65634a612 SHA-1: c4646c9e67e45b4265652f27ac3aa973c1ce7fda SHA-256: deb474fe5c00acd96bb541671be854f42d649338a50152869619394da40187f5
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=ggplot+change+axis+labels', is known to redirect to malicious infrastructure. The presence of numerous links, coupled with the ML classifier flagging this PDF as malicious, strongly suggests an attempt to lure users to harmful content.

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.cc/pify?keyword=ggplot+change+axis+labels
    • http://files.berryblueboutique.net/uploads/1/3/1/1/131163540/2195466.pdf
    • http://files.ohbot.co.uk/uploads/1/3/1/8/131856956/1786514.pdf
    • http://files.southeasternforesttherapy.com/uploads/1/3/0/7/130738752/3144258.pdf
    • https://cdn.shopify.com/s/files/1/0437/3938/1912/files/71766596802.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/nudewatuxepibipuz.pdf
    • https://cdn.shopify.com/s/files/1/0440/3917/6357/files/80806020781.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6348/files/99696574193.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0021/files/bezebavamikokusa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2139/4343/files/91105401005.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/81162805200.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/wofufemowividalizatavarip.pdf
    • https://cdn.shopify.com/s/files/1/0430/8113/8343/files/fixifojadigudegopufajezag.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/mulixamaziwofazosodutaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80463449019.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/14361803281.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_off00006288.bin
d37de440ba57035065a1398eefaf12049897d5febf8138d1b1f2732c8153bcb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6288 5336 bytes
font_01_sfnt_off000074b5.bin
96d04e33cdeb5b4aa786ce1402a9bdcf11779c5f6765c7b7a8647e2adbef08a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B5 14120 bytes

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