Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc6db8ea0c79606…

MALICIOUS

PDF

69.8 KB Created: 2020-08-29 17:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25dfe8c634d307317d9aec56f1db3b47 SHA-1: b88b1ac6db78da014cf0cd1d4c4273f35fca8533 SHA-256: abc6db8ea0c7960634af3038763d11813af3c3c172aa4464d07ac863f24a8ebd
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=fmea+example+in+excel'. The document body, though heavily obfuscated, contains this same URL, suggesting the PDF's purpose is to trick users into visiting this malicious site. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=fmea+example+in+excel
    • https://cdn.shopify.com/s/files/1/0434/7147/0742/files/98970198445.pdf
    • https://cdn.shopify.com/s/files/1/0439/5014/5704/files/storyboard_template_ks2_6_boxes.pdf
    • https://cdn.shopify.com/s/files/1/0435/3690/8439/files/free_cv_template_word_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0432/6182/1092/files/a._n._m_course_information.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/barbarian_totem_of_the_duck.pdf
    • https://cdn.shopify.com/s/files/1/0434/9765/2376/files/semetu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4302/9143/files/lost_one_zero_e_hentai.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/kunuwazizepeduridiva.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/vakidorujomakidonomegigej.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/42910084191.pdf
    • https://static.usrfiles.com/ugd/e4ff69_d2c3fc145e284fecadd5430c99782b39.pdf
    • https://static.usrfiles.com/ugd/b91566_65be030eba1e459aa81d74158274f7bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c41dc75589a48ed94d2cb00558bd87d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f8e99e0d2064a16a84b997467f63680.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ec4e67aac3a43b5b02e31a3907255ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_2415fd677c8c4efca09a2b8bb2eb928c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8fc5307b7c84764b06b437b970d8ec4.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_off0000c2a8.bin
69bedc513e264791afb65ae870b2190fb5f4e4f224e64438937219eb0584c387		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A8 4768 bytes
font_01_sfnt_off0000d36c.bin
23de7788f2956414a094874ce103b21a8bbe4eaace3f34cd5da322c097428c85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD36C 4828 bytes
font_02_sfnt_off0000e3c6.bin
b3964fd909c2ae91f234bbb4fb9e8210116a9ca7e3937f8c4a143f1e66d4dc31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C6 11404 bytes

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