Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0c2322197c2ba5…

MALICIOUS

PDF

39.6 KB Created: 2020-08-09 10:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c65babde5b7d68dddf5cd0a53b02324 SHA-1: c7b4257b331374460a404742cf8a185ee5a4169b SHA-256: 0c0c2322197c2ba5324ed0bef30499c13c3dc2d7e3411706c11a79b53ea3272c
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though obfuscated, contains a URL that matches the malicious redirector found in the heuristics, suggesting an attempt to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=simple+past+tense+verb+to+be+exercises+pdf
    • http://tikin.glossopoeist.com/uploads/1/3/2/6/132681352/2554115.pdf
    • http://files.saugushighschoollearningcommons.org/uploads/1/3/2/3/132303238/simamo.pdf
    • http://files.littleboxfarm.com/uploads/1/3/2/7/132712661/4577359.pdf
    • http://files.artworkbydallas.com/uploads/1/3/0/7/130738607/sarojol.pdf
    • http://karujofur.mollyjonescello.com/uploads/1/3/1/4/131453870/9395964.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/75068364922.pdf
    • https://cdn.shopify.com/s/files/1/0440/5533/0981/files/tukaretazimudapukizu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4068/4697/files/49290433685.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/42973802176.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/gaman.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/office_building_design_standards.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/1888057010.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/satirimasimo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0184/5659/files/bulugapegodesi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/how_to_use_digital_multimeter.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/89661794700.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
    • 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_off00004619.bin
483d216cd4745692aab2c5c9bc495fe3676cf74a55fef5bbbd559e5d66fbffdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4619 5672 bytes
font_01_sfnt_off00005947.bin
2d5fde46b38a873e05df3ab6cdb9d406eb18d79d5f8ac18fb635b6a7a0273744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5947 9740 bytes
font_02_sfnt_off00007ad1.bin
d78d7cc1a68daa951b4fbccbcfb906d5a08ad384f187125596154666a45abe72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD1 16060 bytes

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