Malicious PDF — malware analysis report

Static analysis result for SHA-256 194e3bddc436f4d6…

MALICIOUS

PDF

38.7 KB Created: 2020-08-11 22:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15ae6bd0fa10de03b1f8868f3469cfd6 SHA-1: f5a48e8f6403e9a233c56608a7dd1a6e842b61e0 SHA-256: 194e3bddc436f4d67184b860a3cf6e7aaa094ca95f00426e39550aa9ede3019a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector. The heuristic firings indicate this PDF is part of a link farm designed to direct users to malicious infrastructure. The embedded URLs suggest an attempt to lead users to external, potentially malicious, 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.cc/pify?keyword=anexo+10+oaci+pdf
    • http://files.jojoscelebrationcakes.com/uploads/1/3/0/9/130969731/fatoda.pdf
    • http://gazol.thomasjonesschool.org/uploads/1/3/0/7/130739590/17acd1c.pdf
    • http://gizejes.stevemitchellweddingdj.com/uploads/1/3/0/8/130813821/titifa_zonewopi.pdf
    • http://files.thinktify.com/uploads/1/3/1/6/131606546/perawenopage.pdf
    • http://vonet.pennslandingdevelopment.com/uploads/1/3/1/3/131383314/lewefaxi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/bekanedijojobubesebe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71340125447.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/66716986855.pdf
    • https://cdn.shopify.com/s/files/1/0451/1947/1781/files/business_analytics_by_dinesh_kumar.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/vavizabogexitofepopele.pdf
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/natomolef.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4976/files/cat_touching_plasma_ball.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3535/files/kilezaxupadi.pdf
    • https://cdn.shopify.com/s/files/1/0448/5795/0370/files/local_anesthesia_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/38937343281.pdf
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/kadogemiratefirewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2885/6487/files/basic_english_test.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f51.bin
ed88cc4b8443903f830b26930026191f5c8a2c6527a33311a45090d7d12ecf3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F51 4800 bytes
font_01_sfnt_off00005fad.bin
16d1512a3390ef186b88bbea3ae8c1be898ba54db78d5418f97d5f1d7c7b67b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAD 9484 bytes
font_02_sfnt_off00008035.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8035 4324 bytes

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