Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c00edcc7551d12…

MALICIOUS

PDF

38.6 KB Created: 2020-08-27 16:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c9ca0c95907093431da572bba61d4c2 SHA-1: 5cde396c11db1d046b1cc0f1aa2ddfdd34289b5e SHA-256: 36c00edcc7551d12f539fb56ec51dc7b834858edb769a90c7837a3771bf70a34
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though partially corrupted, includes the same URL and a reference to 'Plus 90 bryant furnace manual', suggesting a lure. The PDF also contains a link farm heuristic, indicating it's part of a larger SEO-based distribution network. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=plus+90+bryant+furnace+manual
    • http://kezowuji.melissalamoureuxlmft.com/uploads/1/3/1/4/131453872/bb8f3ac3152.pdf
    • https://cdn.shopify.com/s/files/1/0435/1351/2100/files/povavewipadutesu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3275/5875/files/24970071970.pdf
    • https://cdn.shopify.com/s/files/1/0447/2533/8265/files/render_html_to_python.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/dodonojonedak.pdf
    • https://cdn.shopify.com/s/files/1/0431/0663/1846/files/donibezelozororaxolezo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/59418601957.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4630/files/15772821852.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/asciidoctor_maven_central.pdf
    • https://cdn.shopify.com/s/files/1/0435/1728/0408/files/60565836157.pdf
    • https://cdn.shopify.com/s/files/1/0450/1274/6390/files/variable_frequency_drive_handbook.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_off00004a52.bin
55b394f6779401880405913e5cd7e10652400b3fea20b7eccaad58dfa15234ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A52 5292 bytes
font_01_sfnt_off00005c2e.bin
35029e17fbdf15104fbcc8c589352cd00d3f85d76e6436ac36b8c689e07aaa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2E 10516 bytes
font_02_sfnt_off0000800a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x800A 4324 bytes

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