Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdcbb65af2fb5c1…

MALICIOUS

PDF

43.5 KB Created: 2020-08-08 19:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02d24aa8f26678ce8a06644f9e5f29bb SHA-1: 433b0c893f38e26409fd49f125aa284fb0db45b1 SHA-256: 9cdcbb65af2fb5c1b5abb834a1c94d996cb432542f5379cd8387ed25fa5ec0c3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to appear as search results for "Canterbury tales pdf middle english". The primary link, https://ttraff.cc/pify?keyword=canterbury+tales+pdf+middle+english, is a known malicious redirector. The document also contains numerous other links hosted on various domains, many of which are suspicious. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=canterbury+tales+pdf+middle+english
    • http://votewopu.dancedepotfamily.com/uploads/1/3/1/4/131483281/mekegazemazenu.pdf
    • http://files.csautoelite.com/uploads/1/3/1/6/131636807/2364478.pdf
    • http://files.nigeldonovan.com/uploads/1/3/2/6/132682745/92f2ef8ae486.pdf
    • http://files.ajeplanners.com/uploads/1/3/1/4/131406816/sifojopese_nidukuzinagimo_xutokajofuzi_roxurugar.pdf
    • https://cdn.shopify.com/s/files/1/0428/8525/1235/files/97339316487.pdf
    • https://cdn.shopify.com/s/files/1/0436/1152/1181/files/20704485297.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/89415625591.pdf
    • https://cdn.shopify.com/s/files/1/0429/0147/1388/files/kazipusuwa.pdf
    • https://cdn.shopify.com/s/files/1/0439/9484/1246/files/3388764534.pdf
    • https://cdn.shopify.com/s/files/1/0431/6125/6091/files/11576449652.pdf
    • https://cdn.shopify.com/s/files/1/0430/3483/7149/files/kim_kardashian_hack_no_surveys.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/sharad_upadhye_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/atrocity_act_punishment.pdf
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/34436291804.pdf
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/reacciones_de_alcanos_y_alquenos.pdf
    • https://cdn.shopify.com/s/files/1/0433/1808/3742/files/buvesutubuzelajufinaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/1891/9837/files/automotive_paint_booth_design.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.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_off00006c7e.bin
14e16ed2e30a570c8ffe3584ad407a424e2c9dcd9455b3e245220f894d97751b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7E 5600 bytes
font_01_sfnt_off00007f58.bin
53fc831daa28d8fb058d46dc20b84960e85cc1d15404a3e873f13fca9eab53a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F58 9732 bytes