Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d87b6be0c07861…

MALICIOUS

PDF

58.8 KB Created: 2020-08-20 22:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0455325f127cbeeac744e83b8100e1d5 SHA-1: 598ecf3fc92e1eee542677c2866ee43426047ee6 SHA-256: a9d87b6be0c078619d359684695cee675f4a06aa4b8a77ced71bc6cac2bab57d
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'project report' and includes the malicious URL, suggesting a lure. The presence of a link farm further indicates malicious intent to distribute harmful content.

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=electro+hydraulic+braking+system+project+report+pdf
    • http://files.kristyboisvert.com/uploads/1/3/0/7/130740196/955411.pdf
    • http://files.northernbeacheseisteddfod.com/uploads/1/3/2/6/132696483/9a8f46ebb3fa6.pdf
    • http://files.energygroupuniversity.com/uploads/1/3/1/4/131407057/234402.pdf
    • http://vafamumu.daniellabloom.com/uploads/1/3/1/6/131606490/pubibexesisaxusuka.pdf
    • http://lobuveka.thebigbarmitzvah.com/uploads/1/3/1/4/131453541/3473869.pdf
    • https://cdn.shopify.com/s/files/1/0432/2616/9503/files/92263076292.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/seconds_to_mins.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/76878728696.pdf
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/kendo_scheduler_editor_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/sisikajiwomelulepup.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/31708014906.pdf
    • https://cdn.shopify.com/s/files/1/0432/6627/7531/files/54466525515.pdf
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/probability_mass_function.pdf
    • https://cdn.shopify.com/s/files/1/0438/1769/7437/files/45522940014.pdf
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/mavekup.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_off0000a71a.bin
31e35a4770f8c40e6611d53dcee9e23f605f3f88b766f6d442c827d7862720f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA71A 5908 bytes
font_01_sfnt_off0000bb11.bin
0beaee060a617f7a37e706988217e82d69b87dc432aa9e44174366711b2b7560		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB11 10072 bytes

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