Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2be27d1500c409…

MALICIOUS

PDF

45.8 KB Created: 2020-08-20 21:43:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b701e17a9228535696423475fe174cec SHA-1: 244eae53069f750fff55adb83f6eac7dab18df71 SHA-256: ef2be27d1500c40971b88e4b351485fc8303924835eb5a06e4157b48fb248662
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to 'adverbs and adjectives test pdf' and a URL that appears to be part of a link farm designed to attract search engine traffic. The presence of a malicious redirector suggests an attempt to lead the user to a harmful site, likely for phishing or malware distribution.

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=adverbs+and+adjectives+test+pdf
    • http://nujitup.vinyldesignyl.com/uploads/1/3/1/1/131164250/4e912157d0a0.pdf
    • http://files.limitlesslawnsprinklers.com/uploads/1/3/0/8/130813409/bolitatewarijo.pdf
    • http://gadikes.jpendersbyltd.co.uk/uploads/1/3/1/0/131070571/bonagel.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/kasaxif.pdf
    • https://cdn.shopify.com/s/files/1/0430/7343/7847/files/76229938498.pdf
    • https://cdn.shopify.com/s/files/1/0451/3467/6133/files/additive_utility_function.pdf
    • https://cdn.shopify.com/s/files/1/0432/7119/2732/files/ladunesuti.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/mosexitotiruza.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/cable_cowboy_john_malone.pdf
    • https://cdn.shopify.com/s/files/1/0435/1475/7288/files/42490101336.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/php_download_file_from_url.pdf
    • https://cdn.shopify.com/s/files/1/0461/3911/3625/files/empty_bass_tab_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.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_off00006e2a.bin
3dce915bd957a13384beef7b6785627372dec79796058162926009c96afe8ac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2A 5384 bytes
font_01_sfnt_off00008089.bin
aaf7981564396269260e8cd5f1a456e33be9777b747c3cc6b6ebc316fd240168		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8089 13212 bytes

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