Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d1b0b85cf107e7…

MALICIOUS

PDF

39.4 KB Created: 2020-09-16 22:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00f966830b315d0bcc5cd36f6e97236c SHA-1: 9d3f0167ed979f4432e131d5eba0ec592e89743c SHA-256: 09d1b0b85cf107e734b7c871a6f50a2d1ceec42fc4f32415cc62c2bdccb0f62b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to direct users to potentially harmful content. The presence of a link farm further supports a malicious intent, likely for SEO manipulation or to distribute further payloads.

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.me/wix?keyword=lewes+yacht+club+swim+team
    • http://files.beautyforashesrwanda.com/uploads/1/3/0/7/130775103/5641266.pdf
    • http://files.garriotthomes.com/uploads/1/3/1/4/131482941/bemokixugija.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://f62d40e6-4c3f-448e-94d3-4225cb54dbe5.filesusr.com/ugd/7dd30d_71896e7b15314b87accbf6860c8ab7ef.pdf?index=true
    • https://48aaba2c-cc94-41d0-9f82-027d397ff1b6.filesusr.com/ugd/e3c460_4896ff8f03fd4ce984b941c78446251b.pdf?index=true
    • https://127a2a4f-a43c-4a2b-a230-9e49a66987ea.filesusr.com/ugd/6f9b04_661c3a8f19c64ed79567b2e9916c4984.pdf?index=true
    • https://82137b76-225a-4757-8729-0ebe6a481922.filesusr.com/ugd/70e7d4_2924701c98674df1888078fd40a3829a.pdf?index=true
    • https://1c732f40-f363-4d74-b0b1-a09beb9ec592.filesusr.com/ugd/735189_a894b7625106469db9f5fd95bfb52245.pdf?index=true
    • https://2b689287-9ac9-4d48-9329-f6721ea6d770.filesusr.com/ugd/a4ea6c_295771d54c2344a6b4e0264a7aaf593b.pdf?index=true
    • https://5a554dbc-f85e-4d39-967d-7b383af37460.filesusr.com/ugd/bc0b97_99fab8f71a23426298ea401f36789d57.pdf?index=true
    • https://cddc2acc-bd3f-4300-82ad-92c20c24e99d.filesusr.com/ugd/227d0f_9b1a54a93aa742bcb539dba9c9607cd1.pdf?index=true
    • https://f32ca49e-2f99-45c7-814e-29d1d4cfa3bf.filesusr.com/ugd/03dcd4_1a778148df094b9ab7fde03e43a5bc9f.pdf?index=true
    • https://7e954b61-bd7c-4417-a1e8-a242c18b84ac.filesusr.com/ugd/bba345_68be99421f104651828b5b96de6909e1.pdf?index=true
    • https://6a5e28b9-4153-4ae8-a45b-b3a92f65be50.filesusr.com/ugd/5af86b_69339ccb50c94d73bf07e24f12fb425d.pdf?index=true
    • 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_off0000509c.bin
a1898c3607fc49215356bd30274c546abb31e444d821e493bf2dc507a5d82ac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x509C 4884 bytes
font_01_sfnt_off00006151.bin
7f1b1b897738ee067be86bc70b8a31089767d96e1b098c392290462d99bd3691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6151 9752 bytes
font_02_sfnt_off000082c9.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C9 4324 bytes

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