Malicious PDF — malware analysis report

Static analysis result for SHA-256 64686a1f099e62d5…

MALICIOUS

PDF

45.5 KB Created: 2020-07-24 10:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f509fd9cc871286353ce6cd82710416 SHA-1: bc99f8dff283e171db03a8773f008e7232435033 SHA-256: 64686a1f099e62d50ce028171db730111629de659c73d0769bf130c6de61c283
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1553.005 Security Software Installation

This PDF file exhibits multiple high-risk indicators, including a critical link to malicious redirector infrastructure and a large number of embedded links, suggesting a link farm or phishing campaign. The document also contains instructions to disable security software and a lure for a password-protected archive, commonly used to bypass gateway security. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=golden+grapher+13+crack
    • http://files.clintweiler.com/uploads/1/3/1/6/131606025/batalixo.pdf
    • http://files.rafwestraynhamassociation.org/uploads/1/3/1/8/131859993/d45db42f6c81cfa.pdf
    • http://files.ridgeclinicairliebeach.com/uploads/1/3/2/6/132681212/edb7cd78bf9be20.pdf
    • http://files.mackymina.com/uploads/1/3/1/4/131453219/f02cbc67.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5636/4709/files/98716126425.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nezax.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/juwanisojin.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/10953498244.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/vukojonejoworotixot.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/ganumotawami.pdf
    • https://cdn.shopify.com/s/files/1/0440/5926/3141/files/xatowowosesifivu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/40704800764.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5979/files/10268435863.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/jewurilodemare.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5026/files/dikulevez.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/90333336386.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_off000074b7.bin
5a8b7a605d8b0000dc362d08dd34a6a76e1658c8a0ed14f1d05e4cfa519f1ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B7 5128 bytes
font_01_sfnt_off0000861c.bin
6f64490eb13e0e0ea8a0743716a0d72be51874c194dbbc708e6ec0a33078cfcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x861C 10308 bytes

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