Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7319f651175af0…

MALICIOUS

PDF

41.0 KB Created: 2020-08-03 07:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c08156e478c848d25f9f50f72ff7e5f8 SHA-1: cb83592cd698e451f710860e4cfd969e6f89b97a SHA-256: 4a7319f651175af08639e31a3c82a2839f38de5c85edbe06db047ce81efcb976
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a PDF link farm. The embedded URL 'https://ttraff.cc/pify?keyword=gimp+rotate+layer' is identified as a malicious redirector. The document body contains garbled text but also includes the same malicious URL and a benign-looking PDF URL, suggesting a lure to disguise the malicious intent. The overall structure points to a link-farming technique to obscure the true destination.

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.cc/pify?keyword=gimp+rotate+layer
    • http://files.coachellascreenprinting.com/uploads/1/3/0/9/130969330/8359487.pdf
    • http://files.shopmylittleparty.ca/uploads/1/3/1/3/131383297/cebfe55.pdf
    • http://xasadag.skipscards.com/uploads/1/3/0/7/130739777/1856822.pdf
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/funenorobasapitasinetani.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0135/files/d_d_bag_of_beans.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/94978394139.pdf
    • https://cdn.shopify.com/s/files/1/0435/3867/7924/files/22296224994.pdf
    • https://cdn.shopify.com/s/files/1/0434/2893/7880/files/unity_move_camera_with_keyboard.pdf
    • https://cdn.shopify.com/s/files/1/0434/1124/3162/files/sefuvizulavovazegome.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/62694148352.pdf
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/79048951309.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/nogosejamesurudevi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/tefotevozusir.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/mesudidenoturudomo.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_off00005684.bin
af92701a263d40ea01a9bff266823b955643e84544cee73d9e7cb7c01e9e639e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5684 4600 bytes
font_01_sfnt_off00006628.bin
545a68cd46347b78b3884090e9e637cc7596abb1287108a3a69187f150746ab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6628 10284 bytes
font_02_sfnt_off00008963.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8963 4324 bytes

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