Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed90caf0ce0bc34…

MALICIOUS

PDF

44.8 KB Created: 2020-08-21 01:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab27ab780e23b677f2a6c946c2860b87 SHA-1: 2357716c844f20bb8b483c7de715aada46ce18c3 SHA-256: 1ed90caf0ce0bc34163354497967d6ac66d80dbbe914b904c2b9b7d77b8e6e43
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at ttraff.com, disguised as a download for 'obd2 diagnostic software free'. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content through SEO poisoning or similar tactics.

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.com/pify?keyword=obd2+diagnostic+software+free
    • http://files.amajoy.net/uploads/1/3/0/7/130776239/5916bab.pdf
    • http://files.milesforcf.org/uploads/1/3/2/6/132681863/935c0f7ba24c.pdf
    • http://files.greatimpressionsstaging.com/uploads/1/3/0/7/130739651/boxidusomej.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/gaseous_exchange_in_animals_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/vufam.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/92914256944.pdf
    • https://cdn.shopify.com/s/files/1/0436/0300/1502/files/zuvokirewodimegudem.pdf
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/16196333974.pdf
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/breeds_of_goat_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0429/0438/7750/files/bryophyta_information_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9760/files/paritavepirabajiro.pdf
    • https://cdn.shopify.com/s/files/1/0433/5999/4014/files/27348732590.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/57697862149.pdf
    • https://cdn.shopify.com/s/files/1/0432/0886/8008/files/powiv.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_off0000707d.bin
6b58bce278d98838c58550a724fa8926efde2ada16d0f6efbdaa17e1e43e51c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x707D 5548 bytes
font_01_sfnt_off00008378.bin
0ba9ce4bf42573af998fcfc2b45510c4e7bde76e7d65d61ce6f8899766f8cad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8378 10236 bytes

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