Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d358a050748532…

MALICIOUS

PDF

42.7 KB Created: 2020-09-19 16:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5501c2ec3ef5570a16168480aee44b34 SHA-1: 080259a0943fe94ac531568f0aae23476e19a60f SHA-256: 66d358a05074853224639e8f1e04ffe7fc8c5cbf312e444b4572ca221ec13a14
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the URL and appears to be a lure related to a 'civil air patrol color guard manual'. The presence of embedded URLs and the ML classifier strongly indicate malicious intent.

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.link/wix?keyword=civil+air+patrol+color+guard+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/63975810047.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/amharic_books_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8863/files/18510073249.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/michelin_star_guide_singapore_2018.pdf
    • https://cdn.shopify.com/s/files/1/0482/3256/2842/files/20659231054.pdf
    • https://cdn.shopify.com/s/files/1/0481/0267/0500/files/illustrated_theatre_production_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/0918/5688/files/aurora_ptc_script_free.pdf
    • https://cdn.shopify.com/s/files/1/0482/6477/3793/files/golden_gate_national_cemetery_memorial_day_2019.pdf
    • https://9bf99913-82a4-4f79-8b3d-b156f47ac23a.filesusr.com/ugd/3f0e57_c14e24cd34344fd18f6b81837dfba188.pdf?index=true
    • https://911faded-25f6-4c56-b51b-ccb771266c38.filesusr.com/ugd/904a8b_f2ad956445444a218a4c6ddbfcbcca7b.pdf?index=true
    • https://c3734d49-1434-4af1-bb44-336b6aa111bc.filesusr.com/ugd/0adedf_ba0c5a1d402042978c3399e7a31bc330.pdf?index=true
    • https://c75d3105-9e15-4221-ab38-4f193aa4614a.filesusr.com/ugd/26481d_61943534bf144ccab70ac1116e056773.pdf?index=true
    • https://daa1a20b-80df-41f1-9a34-dbe63d12ed67.filesusr.com/ugd/bcc0e4_360d5502bf5743e6987e5b32946cd29c.pdf?index=true
    • https://f2e48e50-5d38-40ba-a164-16659bbaa3d4.filesusr.com/ugd/8b61cf_c568367189a44dc7ae1dd34b89cccfb0.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000699a.bin
c8d3f95cae02a574eb1fcaa53a6f2e43b1793cdb7737665494a9f2581057d6df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699A 5180 bytes
font_01_sfnt_off00007b25.bin
e2dcb84edd14b0dcbe519d56a94a0d7edee96a2e60821107c5e4ec73bda8939a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B25 10236 bytes

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