Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7adce3988442f62…

MALICIOUS

PDF

44.0 KB Created: 2020-08-13 09:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a59fb72666c5cff011199e33f9393253 SHA-1: 655a04afe451ab52d61a1470f0087c36293fbbd2 SHA-256: d7adce3988442f625fc93b605fcf2cf1dbad93ccb694d1bb4c020e8033d6267c
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic indicates a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that appear to be part of this link farm strategy, aiming to lure users to malicious sites under the guise of search results.

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/wb?keyword=hospital%20bag%20checklist%20uk%20pdf
    • http://bizorixuf.rushtotug.com/uploads/1/3/1/4/131453213/1e618cfd30500.pdf
    • http://vepobad.adelanteawards.com/uploads/1/3/2/7/132740214/8100612.pdf
    • http://files.ramsportsnetwork.com/uploads/1/3/1/3/131381021/zumorotanosunufob.pdf
    • http://files.healthybalancedbodies.com/uploads/1/3/1/3/131380741/modunajakesufu.pdf
    • https://cdn.shopify.com/s/files/1/0449/7879/8750/files/catering_services_company_profile.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/john_deere_7510_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/migekepasut.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/36824896264.pdf
    • https://cdn.shopify.com/s/files/1/0436/9966/7112/files/gowoviloladuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/2520/2325/files/felavekezujatonure.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/gotikosajewemolutoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/weather_underground_grand_rapids_mi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8985/files/jetabepakuponubijomogoro.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/google_wifi_api.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/lofejit.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_off00006e90.bin
ba8224bd900b8bdb3c4b435b1689d980962b0184d31dd322780c4dc177b873f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 5484 bytes
font_01_sfnt_off0000812b.bin
4cd6a2c05edc2a70e2a5b24c3b6910c51a9ddfbd5800c19aa0d2e7a3aceb3fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812B 9952 bytes

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