Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff61f1351509ba9…

MALICIOUS

PDF

39.8 KB Created: 2020-08-01 05:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad46768d5c736f1dad1aa1ca28f0357 SHA-1: 88f7f383b708ba2d5c7315917b8bb323d2afec0b SHA-256: 1ff61f1351509ba907b6ac8b420ae99b6a6935e10759914bf0b730af43b5e00a
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm designed to distribute malicious content. The ML classifier strongly supports the malicious verdict. The primary attack vector appears to be directing users to malicious sites via these links.

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=jade+wyrm+heroes
    • http://files.kleensweepllc.com/uploads/1/3/0/9/130969034/pidililuwu.pdf
    • http://files.yogawithsarah.org/uploads/1/3/1/8/131871721/gerikazapus-devuxoromudu.pdf
    • http://files.cdjff.org/uploads/1/3/1/0/131071209/1829300.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/sowolibixirewelupube.pdf
    • https://cdn.shopify.com/s/files/1/0435/6649/7960/files/kodi_movies_addons_2016.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupesoxozuwimufuvijolus.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/zalubikurapu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7064/4631/files/metisutivuba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67142307476.pdf
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/folizodebagefunopujavi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/97357806530.pdf
    • https://cdn.shopify.com/s/files/1/0429/5078/7231/files/zixinamivumoledujigajudij.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2150/files/14420408309.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/7138557789.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/rebuzefomiko.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_off00005db2.bin
e2a3c89f5f926e38e3ac133936fbb9b750045faa68e84f8739cbd984b2c325e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB2 5216 bytes
font_01_sfnt_off00006f5c.bin
7f268704280244dc4e9a0287c5f015b709dd24e08ddf299817f0ab293cdfcf37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 10384 bytes

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