Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7045b5aabf800c…

MALICIOUS

PDF

39.6 KB Created: 2020-08-30 19:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20deda23d406c77581288ac7faea0ae3 SHA-1: ce8989e3fdc5b53954cf389643c48b3ef4da2d01 SHA-256: fa7045b5aabf800ca6f6e1506899830f7ca91cfad1227dd3ef6252e83a4f5a3c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a seemingly legitimate keyword. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external documents. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms the intent to lead the user to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=all+weather+portfolio+historical+performance
    • https://static.usrfiles.com/ugd/a382ee_55e021fde9ed42d4b9f9cf1d5d969e83.pdf
    • https://static.usrfiles.com/ugd/b8c837_90c07018ecf4457aad1802b842a1e0c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5dd5b56f6ec452c817aecb991107b83.pdf
    • https://static.usrfiles.com/ugd/87fdc7_aa5977c23abd4f128dcf7f9e86fe8719.pdf
    • https://static.usrfiles.com/ugd/77eba6_eaa07686bcdc4fec9fba4f20815c9c03.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffcab909836f4f569240b4f477341320.pdf
    • https://cdn.shopify.com/s/files/1/0437/3934/9146/files/27361645981.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/audiovisual_translation_subtitles_and_subtitling_theory_and_practice.pdf
    • https://cdn.shopify.com/s/files/1/0434/6380/3046/files/995249873.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88406012193.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_off00005b32.bin
e61ba61b05c4bf443bbad6be834570f0a267ced8835c35660df48b4cfaa66386		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B32 5336 bytes
font_01_sfnt_off00006d43.bin
0ed873f4d53676661b14d29b0ade59a7634e2fdb24f42f330cf4d84f9d36656e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D43 10708 bytes

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