Malicious PDF — malware analysis report

Static analysis result for SHA-256 b21fe53e32fa923f…

MALICIOUS

PDF

56.0 KB Created: 2020-08-10 17:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49c399da5412a2c70a3e1a395a82f733 SHA-1: 29265d900f1f336f7e536b31faca3a2957b7a70c SHA-256: b21fe53e32fa923f35f2298ad91d3aec59d3910db15a4bc3ae6302656306b228
120 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 indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the document is designed to trick users into visiting a malicious site under the guise of providing a PDF on a technical topic.

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=differential+geometry+and+topology+pdf
    • http://files.matteoluciani.com/uploads/1/3/1/3/131383544/8e8bfdb8ee2.pdf
    • http://files.raleighchamber.org/uploads/1/3/2/8/132814415/nawesixiralawid-bixiwat-zuwadetub.pdf
    • http://zutom.kvclissold.com/uploads/1/3/0/8/130814328/sajoronaj_sisesabisuwixe.pdf
    • http://files.seafom-friendsofmontessori.org/uploads/1/3/0/7/130775002/jovonenugujos.pdf
    • http://files.sherwoodfootball.org/uploads/1/3/1/4/131409009/4079754.pdf
    • https://cdn.shopify.com/s/files/1/0440/6696/3621/files/fedev.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/american_states_abbreviations.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/blood_pressure_normal_range.pdf
    • https://cdn.shopify.com/s/files/1/0435/5466/8705/files/gobefagoxikazi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/agroecology_fao.pdf
    • https://cdn.shopify.com/s/files/1/0437/7178/9470/files/xugufilotisepowetono.pdf
    • https://cdn.shopify.com/s/files/1/0436/4523/9456/files/82997285566.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/30494651373.pdf
    • https://cdn.shopify.com/s/files/1/0440/6735/6824/files/rapugikaguxejonuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/uf_law_cost_of_attendance.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000618c.bin
ab376e74e26378a89c6e6c9c072b72f0a5a9538fa910f89f2fd4a4c10240b337		 pdf-font-stream PDF embedded font (sfnt) at offset 0x618C 5072 bytes
font_01_sfnt_off000072b4.bin
131a4805b5fbfdc9dd649613e58a8d4d671fd9ada56e94fb0053d66320e02390		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B4 6264 bytes
font_02_sfnt_off00008309.bin
eda261cec61628d8dede2b705734e6a885bebeb5ef2198afdf6ca96b39978821		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8309 12796 bytes
font_03_sfnt_off0000ac48.bin
36ed9caf719e0849df8fd87ade7d51f3d04b8af5454f1aaa896d38a56b473f78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC48 16272 bytes
font_04_sfnt_off0000c1ad.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AD 4324 bytes

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