Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ab7312946926df…

MALICIOUS

PDF

44.0 KB Created: 2020-08-21 02:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab4e2ca178b4e2d24ac3cb1cb3727893 SHA-1: 3a8587c1a5328c6d5b17bb98c13068918943993b SHA-256: e0ab7312946926dffa5313ffe060fdefb877438d9b45eac6dccaf415b280f2f3
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to car performance specifications, suggesting a lure. The PDF also hosts a link farm, pointing to numerous other PDFs, likely for SEO poisoning or to spread malicious content. The ML classifier 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=2016+acura+mdx+performance+specs
    • http://files.squiredance.net/uploads/1/3/1/3/131398260/bixivenepitivu-gojepusufoj.pdf
    • http://jazodas.drgrahambooks.com/uploads/1/3/1/4/131406063/98a5db15c6.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/rasuvosedokeri.pdf
    • https://cdn.shopify.com/s/files/1/0433/2866/7816/files/apache_web_server_2._4_for_linux.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/zavasefebatotiti.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0815/files/20402318536.pdf
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/greasy_fork_quizlet_hack.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/fujaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/chemiosmotic_theory_of_oxidative_phosphorylation.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/48028742860.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7654/files/cement_and_concrete_mineral_admixtures.pdf
    • https://cdn.shopify.com/s/files/1/0454/7330/0632/files/13335145072.pdf
    • https://cdn.shopify.com/s/files/1/0440/2737/9877/files/toxipu.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_off0000602a.bin
a2992f2577ab7e56802a4bd20bc29d9f98fa19452c6244acf284831c39feecc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x602A 5724 bytes
font_01_sfnt_off00007381.bin
541735bbbbe0d68dc2907d6e250fef9aed12ea0a77dde6b478fda4a181911f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7381 15256 bytes

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