Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ee44949ee9ad99…

MALICIOUS

PDF

58.6 KB Created: 2020-08-06 12:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc8af31c0ea923d5da5db7f2954ccf4d SHA-1: 94e36e27068c14943bf9873e5b0396604d02ed46 SHA-256: 45ee44949ee9ad991231adc26fed91686a36bce5e8e1bd52b4b5aefe0e4d4ff8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: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 PDF is part of a link farm, likely intended to manipulate search engine results or redirect users to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=african+traditional+culture+pdf
    • http://files.thepointlessgrandma.co.uk/uploads/1/3/0/7/130776081/sabugumemifux_rotoxeloveg_puzewidokevod.pdf
    • http://files.stephaniemorianner.com/uploads/1/3/0/9/130969772/9967767.pdf
    • http://birufu.markwatsonwilliams.com/uploads/1/3/0/7/130776757/293527746.pdf
    • https://cdn.shopify.com/s/files/1/0438/1406/0189/files/84536042790.pdf
    • https://cdn.shopify.com/s/files/1/0433/4243/0362/files/86331679375.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/thousand_foot_krutch_phenominon.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/38786808486.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89832202682.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3450/files/58306248924.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2174/files/78521142473.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/safuginogatujato.pdf
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/tumobukinekiwutuvatanifuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/mei-_chan_no_shitsuji.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_off0000a8a5.bin
df1b8a59623e777bfc532401427e032ac4e0bd5f46f10d01f612a5ec5abaf44b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A5 4960 bytes
font_01_sfnt_off0000b996.bin
dcdc6000401b6a3de1a4500a5bb1ad9ff26771f0bb9780f501641d1631145843		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB996 10872 bytes

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