Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d501a93ce9f80dc…

MALICIOUS

PDF

36.8 KB Created: 2020-08-12 12:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c28221ceb681b5aa9f737d8ccba37696 SHA-1: f0dbe2b3cf5aedd1f4a38e5761568dd2b1d5a92b SHA-256: 3d501a93ce9f80dcd3579646fd27181d2b16fcecb075c62b719faea655403943
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including a critical redirector link to 'https://ttraff.cc/pify?keyword=perfect+squares+and+cubes+chart+pdf'. This suggests a link-farming or phishing attempt, aiming to redirect users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=perfect+squares+and+cubes+chart+pdf
    • http://files.dissertationindia.net/uploads/1/3/2/3/132303269/0429923de9.pdf
    • http://files.fluxplay.co.uk/uploads/1/3/1/8/131871554/rivuzikuletum.pdf
    • http://files.sharonviewcorpcenter.com/uploads/1/3/1/6/131607075/ead296ef6c54be5.pdf
    • http://tanizirob.krakela.com/uploads/1/3/1/3/131384709/4119699.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3808/files/46323364320.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/26288829969.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/rubikabimix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6753/1673/files/47947096109.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/viwexegalesotoguwesijutej.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/towebunewenavax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/xelizurat.pdf
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/93328457728.pdf
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/risugojupoxadi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2322/0392/files/cultivo_axenico.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/xukilixuxube.pdf
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/87395499857.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/13854242853.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_off000052f6.bin
ea97dd8c9745c2217888218c3899b4de81d94eb2565212ce00f96091e5114edf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52F6 5480 bytes
font_01_sfnt_off00006576.bin
1d82ff1787176b1d8fc702588c358ad6afb5d8e687d2718f6a8164a594dd8338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6576 9716 bytes

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