Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1c3e22f492d9f1…

MALICIOUS

PDF

40.6 KB Created: 2020-09-17 03:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e8473831596f5bf1e67f9018a494674 SHA-1: 11f8bc2e4e68f03ab9a93c2c3cb6d5fbfdb3848d SHA-256: 5c1c3e22f492d9f15a64b48205010f851dbb72c18ea550e18d6d250307e6679f
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=nicene+creed+worksheet+pdf'. Additional heuristics indicate a link farm and a visual download button lure, suggesting a phishing or scam attempt. The presence of numerous embedded URLs, many of which are benign, does not detract from the malicious redirector. No scripts were extracted, but the overall structure and link behavior are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=nicene+creed+worksheet+pdf
    • http://saxeput.weealec.com/uploads/1/3/2/8/132816202/5029190.pdf
    • http://zaxarumip.nutriandmore.com/uploads/1/3/1/8/131856543/5159225.pdf
    • http://files.raveneyeimagery.com/uploads/1/3/0/7/130740591/suluropekawosixi.pdf
    • http://files.avalonweb.com/uploads/1/3/0/7/130739330/8350599.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0a505b30-973c-4469-84d8-6078852aba20.filesusr.com/ugd/9bd82e_b34ec1e90acf4493ba4e045d2bdb9ec1.pdf?index=true
    • https://821d27c8-35e4-4aec-8388-56c929324504.filesusr.com/ugd/90d19e_6049866f21b34fa5be4457c6a1ab04b1.pdf?index=true
    • https://c9a8240d-c017-40b6-86c7-fd6b60b71f4c.filesusr.com/ugd/e2c223_525b2d392bd449918e261948e4d5d9ff.pdf?index=true
    • https://1a9b85a1-409b-4428-9816-43cb6039a012.filesusr.com/ugd/18ee90_863a0acab3f7425594299eb5bceb03e9.pdf?index=true
    • https://c3afd91c-d9a5-4912-ab82-12c9b71cb680.filesusr.com/ugd/7c41c1_4dd64b96c92c4192b506f88d58526a3c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0438/0157/5586/files/81335941963.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/70656851110.pdf
    • https://cdn.shopify.com/s/files/1/0433/7994/9718/files/23574890116.pdf
    • https://cdn.shopify.com/s/files/1/0436/8033/3989/files/vinuja.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061d3.bin
871373b0fd508987c84139aae70d2eb2bff4fe8418622840938bf6a61bec2d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D3 5124 bytes
font_01_sfnt_off0000735f.bin
1eb5aaad504abfce099c982d607eeb8da37ac7544a97604a0edc7c2bd4ed9940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735F 10104 bytes

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