Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a14a26915261d5…

MALICIOUS

PDF

56.3 KB Created: 2020-08-24 14:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 971defa98886dbc69f22d4873a7d0bb7 SHA-1: aae62c66bc2978406a8f3cfca0f8c0d17b44f233 SHA-256: 97a14a26915261d59d125c2e8af4be3d08f5f62325fee7b4a216b910ff9b7d22
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Augusta national course map.pdf'. This suggests the document is designed to trick users into clicking the malicious link, likely for phishing or to download further malicious content. The ML classifier also strongly indicated maliciousness.

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=augusta+national+course+map.+pdf
    • http://tilak.njaje.org/uploads/1/3/2/7/132712593/xamodomotezenuvuzu.pdf
    • http://files.gresford.org.uk/uploads/1/3/0/8/130813489/7b9cd09.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/18485447245.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1644/files/wafipoxiwipila.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0441/1890/0888/files/26859735377.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/blood_pressure_machine_manual_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/19198406897.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/3541678641.pdf
    • https://cdn.shopify.com/s/files/1/0433/8361/9736/files/pilesogod.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/kefodijujugojosegasod.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2534/files/ct_hnh_trong_file_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/4503/4911/files/brain_on_fire_my_month_of_madness_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000096c9.bin
63bc1dc1e2fc7ae82119f207d554f2e8eca909cca69d1d55ed0e734ef88ea172		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C9 5496 bytes
font_01_sfnt_off0000a958.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA958 1800 bytes
font_02_sfnt_off0000b1e5.bin
fb1963c6f7478310d6a0a83d57f527e862aa458439ab24f3dc51ff9b8e813d8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E5 9888 bytes

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