Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1c62f650bfa13d…

MALICIOUS

PDF

40.6 KB Created: 2020-08-31 13:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2da00bdf77d41c66a7fae6d4e3d77d61 SHA-1: 957d5e76bfc587319ae6e7535af732c808021e6f SHA-256: 6b1c62f650bfa13dc8169eda17921853da76189a84fa5456b47b55aa3e30f2e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.ru/wix?keyword=l89+gps+module+datasheet. Additionally, the PDF exhibits characteristics of SEO poisoning with a large number of embedded external PDF links. The document body, though heavily obfuscated, contains references to the datasheet and the URL, suggesting a lure to drive traffic to malicious sites.

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.ru/wix?keyword=l89+gps+module+datasheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/e33828_fbf61ffb56484d18b0f391e691a55a2d.pdf
    • https://static.usrfiles.com/ugd/585b1d_f6e73059f7dc42e08fe2b77022fce08d.pdf
    • https://static.usrfiles.com/ugd/b8c837_96bb1220464242ba9e414e2cc5540424.pdf
    • https://static.usrfiles.com/ugd/c3f59f_748354af6b544bffa7d3e8deb53b567a.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ebbf8250bd9413c8ee89fee0159f020.pdf
    • https://static.usrfiles.com/ugd/38bf1f_abdc07fb5f4d483291a5b54bd82b0848.pdf
    • https://static.usrfiles.com/ugd/67e251_b3af8fec588b4b8ab6c507cf44caaa0d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2b96ae9efea49cda02753a74a29d5b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_166c583fa7264da5955d4ece513af4a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1fac94d232c474b8aa36e3b150783ab.pdf
    • https://static.usrfiles.com/ugd/89064d_43188c712cd8459292e0fa304777984c.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8281/files/38941932913.pdf
    • https://cdn.shopify.com/s/files/1/0437/8591/2477/files/kumoxezumajigatobovimija.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7607/files/medical_laboratory_siwes_report.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b01.bin
7df147694769365b234bf075d41801ad77c970fdb6638087f0e031d3ddd4b426		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B01 5296 bytes
font_01_sfnt_off00005d03.bin
008b11ad7a658222b1970c8028d5f49ff81ecb095a2341ad7d7b34503469b12d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D03 13500 bytes
font_02_sfnt_off0000876a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876A 4324 bytes

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