Malicious PDF — malware analysis report

Static analysis result for SHA-256 5617e2a55f3961ae…

MALICIOUS

PDF

55.1 KB Created: 2020-08-15 03:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc12d4b03e4ce8186272f5953bd04197 SHA-1: 0744b48b2ab01347e0d5c535f52b801d5ebf5719 SHA-256: 5617e2a55f3961ae94ef1d04a60c856a971885dfdab19b5fb8e374209e41d1ec
152 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 suggesting it is an 'Audited financial report 2018' and includes the malicious URL. The PDF_SEO_LINK_FARM heuristic also indicates the presence of numerous external links, many hosted on shopify.com, suggesting a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=audited+financial+report+2018
    • http://files.ginawebleyherbalist.com/uploads/1/3/0/8/130813696/6783238.pdf
    • http://files.columbiadentcenter.com/uploads/1/3/0/9/130969910/jubegonakajij-desagomabof-sateno-pikilolot.pdf
    • http://panotixu.talkntrot.com/uploads/1/3/1/4/131482853/978e27.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/nivebuzemasisaxasuxomi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/90857362888.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/banking_act_2020_mauritius.pdf
    • https://cdn.shopify.com/s/files/1/0436/1161/9491/files/apixabana_5mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0436/8682/2053/files/.pdf
    • https://cdn.shopify.com/s/files/1/0439/9159/7214/files/xujufosozexotijunerorurom.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/43659893841.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/super_auto_refresh_chrome_extension.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8903/files/git_invalid_active_developer_path.pdf
    • https://cdn.shopify.com/s/files/1/0435/9965/9176/files/tarigevunadivumeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/uwc_online_application_form_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087b6.bin
f0dec4d5d77489a4f17ca3233c147efab4b9c83a9352609f748b392f27c70867		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87B6 5364 bytes
font_01_sfnt_off000099ef.bin
71e4624c954ab9cbded31527cb63f97505f1b06abb238e20481d5cf0020d9ea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99EF 11724 bytes
font_02_sfnt_off0000c19b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC19B 4324 bytes

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