Malicious PDF — malware analysis report

Static analysis result for SHA-256 edeea28f636b92dc…

MALICIOUS

PDF

47.5 KB Created: 2020-08-27 21:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbc809cab0c81a8fbc66e3603c14942c SHA-1: c64c11e4206563fd36d54e7f44a586a92a9426f1 SHA-256: edeea28f636b92dc124961cd9368e0a078fb999093f1219d6165652b5f555918
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this is a link farm designed to redirect users. The ML classifier also strongly flagged this PDF as malicious. The document body itself is heavily obfuscated and appears to be a lure, containing the malicious URL.

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=estructura+de+un+analisis+descriptiv
    • http://files.fittingroomligonier.com/uploads/1/3/1/3/131379268/wujusuruzasojuwepadu.pdf
    • http://files.kecns.org/uploads/1/3/1/8/131871864/movolemamofejujukajo.pdf
    • http://files.aedt4200thesiscourse.com/uploads/1/3/1/3/131398334/6080643.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/sigigokebobekiboxurer.pdf
    • https://cdn.shopify.com/s/files/1/0431/8773/2644/files/chaos_tunnels_scan.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5314/files/32968641548.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8846/files/bithynia_krall.pdf
    • https://cdn.shopify.com/s/files/1/0435/8402/8833/files/electron_configuration_review_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5388/files/vofamefegilirubid.pdf
    • https://cdn.shopify.com/s/files/1/0434/5092/5223/files/biochemistry_mcq_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0411/6637/files/niwofofejikekufilotu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3115/7143/files/78011373918.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/factorio_oil_burning_generator.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0959/files/tesodalawenamox.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_off0000784e.bin
575200fbe2ef6bcf534831ca8b462f8565f65b07fcfa9abd558a8963e9f45ffe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784E 5084 bytes
font_01_sfnt_off000089a5.bin
a527bd327027f510f1be54d9952284923b5264f1d7a3317da76ea5043eff2b40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89A5 11692 bytes

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