Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6f343ffd2ccd08…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 16:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10f2376b07cdabcd883d7293c08f54e0 SHA-1: a3924d66490b5c1e7ced431426342a0ba0d76e50 SHA-256: 5d6f343ffd2ccd08f23d48e5ccafc7d8347741440d990a7a84c45115431ccbe0
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, suggesting an attempt to lead the user to malicious content. The document body, though heavily obfuscated, contains the URL and keywords that likely serve as a lure. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=scrum+mastery+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e2b09b_9bbf6db166de46ab9431990ee41aeaf7.pdf
    • https://static.usrfiles.com/ugd/b13fd1_e8a843d5a00b44cc915b94c3deb355b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_874d9c6da6c144c6b21e727e9e793d03.pdf
    • https://static.usrfiles.com/ugd/b8c837_e35beff690f548fb955e51f8a2d41739.pdf
    • https://static.usrfiles.com/ugd/a4d998_b7ec17b22c4a408a9c9c00bb860c2a34.pdf
    • https://static.usrfiles.com/ugd/ce77c6_216f5441985a4d8a8c70c069288088a3.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_ee3d19cef4c047e1aee6f5f46a8f3b91.pdf
    • https://static.usrfiles.com/ugd/b8c837_25d91c7bdb5b46f9a90f6ebb338b124c.pdf
    • https://static.usrfiles.com/ugd/1a89c8_db4104fcbad641879bb82db4bed9becc.pdf
    • https://static.usrfiles.com/ugd/b8c837_a322527bd40c4432be99b75aae917238.pdf
    • https://cdn.shopify.com/s/files/1/0434/3319/7718/files/89572104561.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1560/files/sudazatobipabil.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8139/files/xewaroxirosozagutil.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/xosolonupamitasimoj.pdf
    • https://cdn.shopify.com/s/files/1/0439/0587/6123/files/75213037211.pdf
    • https://cdn.shopify.com/s/files/1/0435/8609/3214/files/betawa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8373/3915/files/10616361123.pdf
    • https://cdn.shopify.com/s/files/1/0450/7625/0776/files/cartoon_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1285/files/93216907499.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_off000065d4.bin
8c35a1653f488deee7d6b572dd8567460060756cf7dbfcec355f0006e79dd9b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D4 5472 bytes
font_01_sfnt_off0000785d.bin
c878ad5cc34e5340c7a7b0e7d98f88eb2d9fd743c5102be9c8117806820f0502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x785D 10780 bytes

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