Malicious PDF — malware analysis report

Static analysis result for SHA-256 05bac49e16f4631d…

MALICIOUS

PDF

48.1 KB Created: 2020-08-09 07:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d30fd75ac79e3d87502ed39fe3924b89 SHA-1: 99e151fc8f74a4fe9ee65bea2048f33a86c8016a SHA-256: 05bac49e16f4631d8dc75f473d9072dc54488a99c4da544b354df4815a39df11
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm pointing to a malicious redirector. The ML classifier also flagged the PDF as malicious. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content or phishing pages.

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/pify?keyword=types+of+cctv+system+pdf
    • http://demetunaj.artandsoleacademy.com/uploads/1/3/1/4/131483281/e6df929.pdf
    • http://files.schramselfdefenseproducts.com/uploads/1/3/2/6/132695582/gapapavepunamiwa.pdf
    • http://files.christianmindfulness.com/uploads/1/3/1/4/131454114/2218603.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7348/6496/files/wategapegos.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/69657704180.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/zejudidajomozotekurinozu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5529/9237/files/wosorajojomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/39415409064.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/chiller_hitachi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4432/files/87867666315.pdf
    • https://cdn.shopify.com/s/files/1/0437/4655/8113/files/25188561559.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/uranium_enrichment_process.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/sim_card_cutter_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/lupowulevabivemazupaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/31562035750.pdf
    • https://cdn.shopify.com/s/files/1/0429/5668/5468/files/lizizijomigigexuwavas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/65055675695.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/sugajusunofoxukodobom.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_off00007f02.bin
312cf953d7d497df67a2678429659818172c642c2d6ae1fe903bc79fb1e5eeee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F02 5076 bytes
font_01_sfnt_off00009056.bin
2999d914f17107ee5efb074b16525a22767a994203a2d784d9dc22a02fdb4d66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9056 10320 bytes

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