Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdc3591e7c0f295…

MALICIOUS

PDF

41.5 KB Created: 2020-08-08 09:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f34d0d576a2e00ce60f8884001330e3 SHA-1: 7275660c253d039f567f93de855637b89062de2b SHA-256: 9cdc3591e7c0f295a2fa055302f350176370ae1afae53625a85b87792d8efbb4
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure for a 'Walmart supervisor assessment test answers' PDF, which is likely a phishing or scam attempt. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, likely to distribute the malicious content more widely. No scripts were extracted from this sample.

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=walmart+supervisor+assessment+test+answers+2020+pdf
    • http://files.nathanwindt.com/uploads/1/3/1/4/131437849/9a6b3cbad2a.pdf
    • http://files.linetweaker.com/uploads/1/3/1/8/131872079/adf7a26.pdf
    • http://files.middleclassempowermentzone.org/uploads/1/3/2/8/132815008/limoroxajudaban.pdf
    • http://files.americancanyonchiropractic.com/uploads/1/3/0/7/130775830/e339b500.pdf
    • http://files.millerunitedmethodistchurch.com/uploads/1/3/1/0/131070030/5370156.pdf
    • https://cdn.shopify.com/s/files/1/0439/3595/7147/files/xidazeduj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7347/files/3d_cube_live_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0435/8412/7135/files/2537528933.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2374/files/lubopexi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/bosupokuluv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/kezukaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0839/files/budisemufugobuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/7201/8845/files/through_the_fire_and_flames_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/mijobazivab.pdf
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/barefoot_investor_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/neumonia_adquirida_en_la_comunidad_en_nios_2020.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_off00006385.bin
ebe4275ddbf8bae984a4c3ab83aef5aa80f0f56a9cdc555b547dd64889291d4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6385 5628 bytes
font_01_sfnt_off000076b7.bin
a65696332f52dfaa405ab5265741882aec8299c2286cb4b9ad1b4a872b366d57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B7 10040 bytes

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