Malicious PDF — malware analysis report

Static analysis result for SHA-256 40378267e83b65fb…

MALICIOUS

PDF

32.9 KB Created: 2020-08-31 22:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 365468b0a4e208fa9cd0bcfe90286bfc SHA-1: 9d0cde04504adf1b3e2f79b79ba5eb72953258ad SHA-256: 40378267e83b65fb133d0043c0f251b9ed97c5603d47b2a82e2397a5c57c6603
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to https://ttraff.com/wix?keyword=ariens+snowblower+st824le+manual. This indicates a phishing or scam attempt, likely to lead users to further malicious content or downloads. The ML classifier strongly supports the malicious nature of this PDF.

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=ariens+snowblower+st824le+manual
    • https://static.usrfiles.com/ugd/f3ecbe_f7307c5dc523413e9066730935a1627c.pdf
    • https://static.usrfiles.com/ugd/ab0441_f85d7db5bcfb4b2f8cde1f66e02e58ff.pdf
    • https://static.usrfiles.com/ugd/80c1db_4d70f6c4c481406e81f321a03d759852.pdf
    • https://static.usrfiles.com/ugd/b8c837_3544602e03e64af2b92d58f3b9961831.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/beripowiloteke.pdf
    • https://static.usrfiles.com/ugd/b8c837_30e5cc5025a64bebbebfacf31c504f08.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_cb8b8420856545d29bb73876bc144987.pdf
    • https://static.usrfiles.com/ugd/625844_27ee628b086d4848a396028953c5dfab.pdf
    • https://cdn.shopify.com/s/files/1/0440/7489/3477/files/books_english_speaking_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8487/files/snoo_smart_sleeper.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_off00003fa8.bin
1b300717000053f935d57acc5da14a65d6ad069c8ac7f5f57f0cd5bebacc59b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3FA8 5468 bytes
font_01_sfnt_off0000523e.bin
57a7c8a273374231f27e0b52aed9a0a8d4eefc6da83536da4531e0beda971a59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x523E 11036 bytes

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