Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb906612341f9b3…

MALICIOUS

PDF

38.0 KB Created: 2020-08-25 09:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00adc52678927ad123370cc035bdeaf5 SHA-1: e5648d38ba8721e0f2655fd96614686d00f43716 SHA-256: deb906612341f9b3f24eb91b84729c5b4fe09d546310e8c89275834eacb94d0d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=assamese+hit+video+2018'. Additionally, it exhibits characteristics of a PDF link farm, with multiple embedded URLs, one of which is 'https://cdn.shopify.com/s/files/1/0433/9331/9079/files/64853812087.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and the malicious URL, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=assamese+hit+video+2018
    • http://junawez.stjca.org/uploads/1/3/0/8/130874575/6074476.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/64853812087.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0247/files/flow_cytometry_basics_guide_bio_rad.pdf
    • https://cdn.shopify.com/s/files/1/0433/9266/3703/files/apache_open_office_spreadsheet_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/5474/3200/files/habanera_from_carmen_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/3675/3570/files/passport_application_form_bangladesh.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/wuziduzubejenomosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5031/files/principles_and_applications_of_aggregation_induced_emission.pdf
    • https://cdn.shopify.com/s/files/1/0434/6698/1542/files/brazil_vs_germany_2014_highlights_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9144/4390/files/18702654833.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005702.bin
ba632092c5c5252fed4be269062e124283d67a99d88f13c7e17656cfc15cee99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5702 5508 bytes
font_01_sfnt_off000069a4.bin
36ea257415fa9d8224dc137cecdef281b613ecd04ed3e8d433e4017a57f98407		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A4 9968 bytes

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