Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1cb168d6a0c97f6…

MALICIOUS

PDF

41.8 KB Created: 2020-08-23 01:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81a514273e3a2f2ac480005d118a85f5 SHA-1: 6e95874aaca50c95559348157d17bb67454f1333 SHA-256: b1cb168d6a0c97f66d5e5f99b46bd58e41b6d6781ea5139d6bef01887bbfd1c9
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.ru/pify?keyword=ned+yoyo+tricks+sheet', is flagged as a malicious redirector. The document body contains the text 'Ned yoyo tricks sheet' and references wkhtmltopdf, suggesting a potential lure or content manipulation. The primary attack pattern involves directing users to potentially harmful external resources.

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.ru/pify?keyword=ned+yoyo+tricks+sheet
    • http://files.katiemanthey.com/uploads/1/3/1/6/131606256/6930696.pdf
    • http://files.mrlucero.com/uploads/1/3/1/3/131382239/kizoted-sadovowanasumi-lefotap.pdf
    • http://files.northchesterbaptist.com/uploads/1/3/0/7/130739616/zolinonuxazoza.pdf
    • http://files.boundtogethercounseling.com/uploads/1/3/2/6/132681901/jolewaxizor-zadinonenifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1823/1709/files/66524146811.pdf
    • https://cdn.shopify.com/s/files/1/0431/0034/0381/files/safidupirotufutewa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1895/files/kitadudimu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8201/5135/files/adoption_and_safe_families_act.pdf
    • https://cdn.shopify.com/s/files/1/0436/1152/1181/files/63328408264.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/54859370896.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/laxizig.pdf
    • https://cdn.shopify.com/s/files/1/0448/0499/7271/files/6399895925.pdf
    • https://cdn.shopify.com/s/files/1/0428/5333/5207/files/luzuxij.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/tudujiwemasoxalos.pdf
    • https://cdn.shopify.com/s/files/1/0434/4388/0093/files/gotawexaxokokitanuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2664/files/brother_sewing_machine_jx2517_manual.pdf
    • https://cdn.shopify.com/s/files/1/0448/3717/5456/files/kent_county_jail_inmate_search.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_off00006605.bin
74a2a3f24d94031338f783c3c957bb3023a749eab37f22284bef838226068b43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 4920 bytes
font_01_sfnt_off000076c3.bin
9c8587e6b66a3b583ac6eb39656e9949f3550ee98b60613e5bdebf5c8780d647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C3 10328 bytes

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