Malicious PDF — malware analysis report

Static analysis result for SHA-256 15429394cdf83430…

MALICIOUS

PDF

45.8 KB Created: 2020-07-31 16:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64f377e53a037ece2ff68c1b7a629d23 SHA-1: fc9d65acc2b74c3083f4fa89ff21c576aaeda72e SHA-256: 15429394cdf834308c777de9196fdec3654916a40de8ac4990469bc7fb0c197a
202 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body also contains a call-to-action phrase and instructions for handling a password-protected archive, suggesting a phishing or social engineering attempt. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.cc/pify?keyword=php+password+protected+page
    • http://files.cileiaslittlecloset.com/uploads/1/3/1/4/131438616/toxasida.pdf
    • http://files.carrbridgeselfcatering.com/uploads/1/3/1/3/131381946/211a18db4a.pdf
    • http://files.harrisburghigh.org/uploads/1/3/1/3/131379371/d7ff44.pdf
    • http://files.sunrisechiropracticcenter.net/uploads/1/3/0/8/130814100/3467563.pdf
    • http://files.aitorlajarin.info/uploads/1/3/0/9/130969708/618929.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/cpp_reading_text_files.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/75231748141.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/vikiregezub.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/dedufiburibar.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/nenoxezigosivanixagum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3141/files/12552300832.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1866/files/63511106279.pdf
    • https://cdn.shopify.com/s/files/1/0432/8695/4140/files/2074453862.pdf
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/nuzamivizoruva.pdf
    • https://cdn.shopify.com/s/files/1/0440/7744/9366/files/unity_camera_follow_player_2d.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_off00007562.bin
1cdc2f4d63ba1a2ca97543f63fc13dd8b523ab44a28753ba3745100042d7bdd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7562 5396 bytes
font_01_sfnt_off000087c9.bin
b70b922c0c327b2c58b7a71dc92eb99517496c6f6510e05a28089656337b8887		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C9 10192 bytes

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