Malicious PDF — malware analysis report

Static analysis result for SHA-256 69668c6d45b1516e…

MALICIOUS

PDF

33.8 KB Created: 2020-08-04 14:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50ed22eb531587c8446b72d0f6f9d689 SHA-1: 452127484be847726c4045f3065ecc9f34c15594 SHA-256: 69668c6d45b1516e6243ff60bf28e9560fba6f9d8d50c2848590f16d57b9fd0b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. This suggests the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/pify?keyword=ap+budget+speech+2020+20+pdf
    • http://files.breezyshoresmininubians.com/uploads/1/3/1/8/131871744/9615312.pdf
    • http://files.dwchinchillas.com/uploads/1/3/1/3/131398129/f1d92584bcf09.pdf
    • http://files.wbc2018.org/uploads/1/3/1/4/131453574/cb36e8c.pdf
    • http://files.weirdprovidence.org/uploads/1/3/1/1/131163969/6085919.pdf
    • http://files.laurarodriguezphotography.com/uploads/1/3/0/9/130969885/6111397.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/40168337822.pdf
    • https://cdn.shopify.com/s/files/1/0437/1555/9573/files/1999_toyota_camry_repair_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/3901/2502/files/gowalesabexirexibejig.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0957/files/79148008694.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/data_structure_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/firoroxemered.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/lakugaruba.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/zulokigufufi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6405/files/9227431149.pdf
    • https://cdn.shopify.com/s/files/1/0436/5526/6457/files/jnv_class_9_admission_form_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0944/files/jozikojirix.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/18201664753.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0306/files/nuwegubukotakuxadezevodub.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047de.bin
b4094e54af1c6437a7f6e814e1c7d07a70ce7032a057bf91471d757498f3e39f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47DE 5484 bytes
font_01_sfnt_off00005a92.bin
24ff87ed84ccbb9a2ccb71beb57900b425931a6cf0b61f075ed1c4d0b0957675		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A92 9284 bytes

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