Malicious PDF — malware analysis report

Static analysis result for SHA-256 edaad250c24074e5…

MALICIOUS

PDF

66.1 KB Created: 2020-08-24 21:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99a8de5f5aba71046bf06c3f0bef5f70 SHA-1: a86a34fc90980a0859c75ec22b56245888580565 SHA-256: edaad250c24074e506f3130bd3a84495d53cf41dca074a728456dbd0c53d5291
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links, with one specifically pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=ansiedad+pdf+psiquiatria'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to 'anxiety pdf psychiatry'. The heuristic firings confirm the presence of malicious redirector links and a link farm within the PDF structure. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=ansiedad+pdf+psiquiatria
    • http://files.sdbvl.com/uploads/1/3/1/4/131454816/bezabuxozizuluk_guzurila_jowaluvimiji_finixinemuvaxij.pdf
    • https://cdn.shopify.com/s/files/1/0438/1720/5920/files/formal_breakfast_table_set_up.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/types_of_bandaging_techniques_red_cross.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/paxuvejitikiku.pdf
    • https://cdn.shopify.com/s/files/1/0438/3349/1606/files/descriptive_writing_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/71951467666.pdf
    • https://cdn.shopify.com/s/files/1/0435/0358/3384/files/lakajivevatozu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/loxixabobijivefawujemi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/konitege.pdf
    • https://cdn.shopify.com/s/files/1/0435/0659/8040/files/all_book_writer_name.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/23666834917.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0124/files/material_requirement_planning_journal.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/butterflies_are_free_play_script.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_off0000c621.bin
6e9c2a9426feeb122e0b90e58d47589802afcf395ee25f028d032acaa51dc9e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC621 5116 bytes
font_01_sfnt_off0000d792.bin
5182ba87f18d11fb392b5fb48ef49daf82eaab7adc06f005f95717708958522c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD792 10520 bytes

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