Malicious PDF — malware analysis report

Static analysis result for SHA-256 308e9129c4e16642…

MALICIOUS

PDF

40.8 KB Created: 2020-07-31 22:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd0161b739fffd11b8bd6a5b04ce45ba SHA-1: cb4cfcb271f3fc10ab6af1bfb9717a1bf66049af SHA-256: 308e9129c4e1664200b5b80e94a29cc4c1f15a1c0909cce7ba6f58877fd2342e
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, which is indicative of a link farm. One of these links, 'https://ttraff.cc/pify?keyword=1963+chevy+pickup', is identified as a malicious redirector. The presence of this malicious redirector suggests an attempt to lead the user to a harmful site, likely for phishing or malware distribution. 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=1963+chevy+pickup
    • http://files.lincolnfencecontractors.com/uploads/1/3/1/4/131408798/dupusikabu.pdf
    • http://files.houtsandhome.com/uploads/1/3/0/7/130740524/bubiwujaxe.pdf
    • http://files.sudensuukon.com/uploads/1/3/2/8/132814996/pigipojukiluf.pdf
    • http://files.kafyeblaan.com/uploads/1/3/1/8/131856381/becb5.pdf
    • http://files.busybeetheatrecompany.com/uploads/1/3/1/0/131070895/pamugavedoluxit.pdf
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/45632045535.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/gadunalaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/dosepekuxel.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/wubazorujujo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/mexamul.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/rotikirawimovo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/38717379023.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/85339616825.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/xorumixiximesal.pdf
    • https://cdn.shopify.com/s/files/1/0435/9910/2115/files/89697954685.pdf
    • https://cdn.shopify.com/s/files/1/0439/3720/2344/files/hyster_forklift_rc.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_off0000625f.bin
e6da46f21e58eaa35883119ff715a14e93c3e6e9a49b3ead9759c2fab2afabcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625F 5160 bytes
font_01_sfnt_off000073ff.bin
7ef8ef678fb16d213a626857883a259652873f4ee0ca0a74c944bf920d312836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73FF 10144 bytes

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