Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec811c19900f7bc5…

MALICIOUS

PDF

47.2 KB Created: 2020-08-11 00:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a2e10b3a89d592ce1597071a2565ab6 SHA-1: 068cd7d587a6f576a7ad8fd68f1194ad69bb1d5e SHA-256: ec811c19900f7bc5796a37c007e03e3fb2f3dfcd9d8fa71ad3fa366200740a0f
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a link to a known malicious redirector at 'ttraff.ru'. Another heuristic indicates a 'link farm' pattern, suggesting the PDF is designed to host numerous external links. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wb?keyword=fasciola%20hepatica%20pdf%20microbiologia', reinforcing the malicious redirector finding. The presence of embedded URLs and the malicious redirector strongly suggest a phishing or malware delivery attempt.

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/wb?keyword=fasciola%20hepatica%20pdf%20microbiologia
    • http://pajopo.jonolick.com/uploads/1/3/0/8/130814328/a56d9e066a.pdf
    • http://ranuv.nwadventureguides.com/uploads/1/3/2/7/132712615/tatufomigemaporoxile.pdf
    • http://xawof.shepherdscott.com/uploads/1/3/0/8/130813528/0ee4d62ffbd8.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/adobe_photoshop_7._0_tutorials_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/doweketifiwub.pdf
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/74398365377.pdf
    • https://cdn.shopify.com/s/files/1/0437/4449/3720/files/tratado_de_dermatologia_belda.pdf
    • https://cdn.shopify.com/s/files/1/0435/6780/8667/files/sopoketejagedowefalikesug.pdf
    • https://cdn.shopify.com/s/files/1/0438/3558/8770/files/60606108882.pdf
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/rainbow_play_systems_assembly_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/apa_manual_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/68245687195.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_off000078d3.bin
690ea6b3f2aa9290bdd64adcc59b22815b2c50b4e5c909518f8360c581b3ef63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D3 5664 bytes
font_01_sfnt_off00008bec.bin
63b169d4b8b2ce5907988568dfb46c03fb6d9c80374e7ea9f5a03e1e0fd625e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEC 10980 bytes

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