Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ffe80a82740a2c…

MALICIOUS

PDF

56.3 KB Created: 2020-08-02 21:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 586ff477827a6b123026c2b66b507c37 SHA-1: 527cab4d660cf336092a7d66a1072667d8198570 SHA-256: 15ffe80a82740a2c29f4316a34397d4d54f6214803357637e11ce27e81b3fd04
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body text, though partially corrupted, contains the string 'Brew install virtualbox' and a URL that matches the malicious redirector, suggesting a lure to trick users into clicking potentially harmful links. 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.ru/pify?keyword=brew+install+virtualbox
    • http://files.fancyrat.net/uploads/1/3/1/4/131437660/vasolizobogo-tajigixitif-sivelulenutoda.pdf
    • http://files.divinemercymusic.org/uploads/1/3/0/7/130738801/wiwewinupibapejapuni.pdf
    • http://files.thehollywoodhoosier.com/uploads/1/3/0/7/130739399/dinaratox-gametiminonugox-vogukoz.pdf
    • http://files.beonegallery.com/uploads/1/3/1/6/131637226/paloriwudasexadose.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1352/0029/files/55987123260.pdf
    • https://cdn.shopify.com/s/files/1/0434/0934/2614/files/dekopul.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/59729816863.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5094/files/75655037340.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/24222234797.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/lijuzibote.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/tebagom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77084518355.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/3341972369.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/40533731507.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/tumefudo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2613/7756/files/84053525911.pdf
    • https://cdn.shopify.com/s/files/1/0432/9570/3204/files/bejemekodijisun.pdf
    • https://www.virtualbox.org/
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086d3.bin
085ec7e928fd17708ebd8afa0165979e04ccc82d3dda8bb0ee009995f813e9d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86D3 5088 bytes
font_01_sfnt_off0000984a.bin
b796808b5a44ccab54d9e3f369f3bf2b3afd40bb3c10a221689125a7bd58c1a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x984A 10740 bytes
font_02_sfnt_off0000bd39.bin
44d9c922acaebf0bd89bbc2f700668b039ba04d1dda10151fc3f369deea26354		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD39 16512 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.