Malicious PDF — malware analysis report

Static analysis result for SHA-256 103011e8262e2d7d…

MALICIOUS

PDF

42.8 KB Created: 2020-09-19 06:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95046150794c143989dfd7cbb0c48b78 SHA-1: c6786c50d09d07367a52a3e3da032854f9c0209e SHA-256: 103011e8262e2d7d742ad7f63779fdd90728f00c60fc2e941a14706ac5708a71
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that leads to a farm of other PDF documents, likely as part of a phishing or SEO manipulation campaign. The ML classifier strongly indicates maliciousness. The embedded URL is a critical indicator of malicious intent, attempting to redirect the user to potentially harmful 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.link/wix?keyword=sinjid+shadow+of+the+warrior+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4938/5110/files/partners_group_infrastructure_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6056/files/mememakezum.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1973/files/suzuki_outboard_workshop_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/wateraxodisobolonove.pdf
    • https://cdn.shopify.com/s/files/1/0483/5147/7913/files/jinobelopavonilorokuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4738/6264/files/xotinofen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9737/5399/files/vintage_softcore_movie_download.pdf
    • https://57396909-d5db-48c0-969e-781e34a858ec.filesusr.com/ugd/e3834b_9e7526199c9e4f17840a3f630bc7ac52.pdf?index=true
    • https://7f91399f-de7d-4768-9e27-f72ca595b38d.filesusr.com/ugd/6203b9_48bb8b0b1e4243f3b4b5432d00baac5a.pdf?index=true
    • https://04cdd993-ef3a-4bb3-9d33-2fd91c7f3a6c.filesusr.com/ugd/d2751c_550deb8f988b49f6b52b23ca521b200c.pdf?index=true
    • https://f82bd923-e5d8-4470-832b-17a45f6027fc.filesusr.com/ugd/229b11_522b833ab590426abc418227b66cf188.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/6392/6174/files/everfi_module_7_final_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/0900/0103/files/42021734713.pdf
    • https://cdn.shopify.com/s/files/1/0432/2168/0283/files/tatunada.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e01.bin
1aa7062ce42f44e6390cd9c4ebc469d0bf121447825f4354ba1c263207a518f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E01 5264 bytes
font_01_sfnt_off00005ff4.bin
e624b13cf9db95db8a631da3fbc02aff1b40a3c1f58d7a15733a8bcd2065c5a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 14096 bytes
font_02_sfnt_off00008780.bin
f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8780 16164 bytes

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