Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab0dbfbfdae7bc3…

MALICIOUS

PDF

49.8 KB Created: 2020-07-31 15:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 299c89b29e6a980d75b0055ae4d4bd5a SHA-1: 8e70c7f6e50b07ecbece6f0caf55102baa053863 SHA-256: 6ab0dbfbfdae7bc35f7a91dda792a2cee913e227ca319302eb4b79c9031977eb
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body itself contains obfuscated text and URLs, suggesting an attempt to disguise its malicious intent. The primary attack pattern involves directing users to external, potentially harmful, websites.

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.ru/pify?keyword=bloodborne+forbidden+woods
    • http://files.destinationapp.co.uk/uploads/1/3/2/7/132710763/e94dbdb996455d.pdf
    • http://files.allstarkarateut.com/uploads/1/3/2/6/132683088/6188705.pdf
    • http://files.sheeshees.com/uploads/1/3/0/7/130775215/xukox_wafajojiz_dexemir_dosobidozu.pdf
    • http://files.stone-bowl.com/uploads/1/3/1/4/131412290/redokig.pdf
    • http://files.motoworxiow.com/uploads/1/3/1/4/131453278/a9c60b5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5394/8836/files/3471031024.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/9998243935.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/modilajenopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1677/4054/files/nafikatusodafalamona.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/14229078841.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22411539251.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/27283435621.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/doferokumutevofenigo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9013/files/kujoke.pdf
    • https://cdn.shopify.com/s/files/1/0439/7708/0990/files/87238830404.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/70951591165.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_off00008635.bin
74d2f6e90e43912552d851f71491dbd1dd4af335ecfa827830bbefd90b649dad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8635 4972 bytes
font_01_sfnt_off0000973f.bin
b6d7029047dba0552e6a72789fdc11cb408fb7116574a90896084a6210232a84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x973F 10880 bytes

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