Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b422a733b171eb…

MALICIOUS

PDF

45.3 KB Created: 2020-08-30 14:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0379fd93eb1fa52f37556e53454d0cb7 SHA-1: bb5b174d93846a8d137c856431749916c3f44a3e SHA-256: 69b422a733b171eb1be9269ef87391623b81fcba6113e0c32ac7e2158244d6e1
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that the document is designed to drive traffic to malicious infrastructure, potentially for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'Astm c403 pdf' and the malicious URL, suggesting a lure to disguise the malicious intent.

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=astm+c403+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_df6601f92c884f0786c7ba4c1e132fd1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/735189_315934f126e14f639ce261528f2a576d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8f270386712642d7ab246af03b1606e4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_76d2d8ee02c84bb3b86aaea4000516f3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_db400fc316c843138e2e4d2174a9585e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7878/5951/files/articulate_storyline_3_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/tezesexawunem.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b88e3d_271b41543607497f82d0e047e597b32c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_594e62a26def4f958d9c5a3b23c604a4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c12414_3dab12fe383b48f9b9e2dfc75828fe6f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cbdbb6_b956f05d2bc44f93b88e3e85a10baa7c.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6E 5344 bytes
SHA-256: 3b6afc5f65065874d53b964bd1b83068d468c7cf35076bf07f3bebd658c84637
font_01_sfnt_off00007c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C90 14500 bytes
SHA-256: 9af3f4447317434ba7287b44d93ee12131b51906563ee25a021ad78e77b6de15

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