Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea08d4032798809f…

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 07:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08abb17560970b02f8c75ca7abb4c204 SHA-1: b9dc063568184060a1ec30a69637231c6b1252cf SHA-256: ea08d4032798809f6c66a5a1ab40d6fad1b46d0e1a01605f13f91a98edb27fba
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to a malicious URL, likely for further exploitation or phishing.

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/wix?keyword=jager+elite+skin
    • https://cdn.shopify.com/s/files/1/0434/5797/0329/files/55308365945.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/79176303346.pdf
    • https://cdn.shopify.com/s/files/1/0463/3523/0114/files/bogujudaze.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/battle_realms_4.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/51697921734.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/math_expressions_homework_book_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1528/files/33071482267.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/banking_industry_definition.pdf
    • https://cdn.shopify.com/s/files/1/0463/6943/9899/files/context_clues_to_determine_word_meaning_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0460/9182/9412/files/7141386707.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_off00005f19.bin
eaa7b862f5e5006cf2836427549fbe5207449a840d07ec5ca61a240ade63541a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F19 4908 bytes
font_01_sfnt_off00006fd8.bin
7571a7f8bfe1ec5db16307a3caaf8d1e76943b7b2d9dd815f09867683f4d7a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD8 10280 bytes

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