Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce02562e8a92a615…

MALICIOUS

PDF

46.2 KB Created: 2020-08-31 03:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c56e420f205dbb70081a05de0455a248 SHA-1: 8dc1ed7c861fac43480f715bfd77948345790be5 SHA-256: ce02562e8a92a6153cef34b1ff2d57051a002ddcd22dbd5eb4090daf55281c80
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to 'Jacuzzi jet pump parts' and the authoring application, suggesting a lure for potentially unrelated search traffic. The primary attack vector appears to be directing users to malicious external sites via the embedded links.

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/wix?keyword=jacuzzi+jet+pump+parts
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/59234052893.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/sewufakesifonaw.pdf
    • https://cdn.shopify.com/s/files/1/0465/0467/3430/files/zupamopula.pdf
    • https://cdn.shopify.com/s/files/1/0431/6417/2445/files/22462888178.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/suwab.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4457/files/kujetaf.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_68892de1e1bd4b74a062175dfca9e58e.pdf
    • https://static.usrfiles.com/ugd/6c032c_efdec068d390487da13b718191f34b3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_232f1ba59f154013bfdfcf99f5e48480.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e2f6c4580ee4986b92e237e10cd5b81.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_12c40f9b00f04530a1a1ca3de9631de3.pdf
    • https://static.usrfiles.com/ugd/e3834b_d7bfc0c561d64bf7906f9d870bbe632a.pdf
    • https://static.usrfiles.com/ugd/e02969_f945a9fdabf74118846d2fc258f139f6.pdf
    • https://static.usrfiles.com/ugd/a44510_ec858a8428974f709762a7d53508767c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2803fc05dab84343b08fa42b98065201.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_off000066b5.bin
8b79774cb03abacab983b599cff42ed1ce9f3e10e20049b9d9e45d7c148912fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x66B5 5164 bytes
font_01_sfnt_off00007831.bin
2f5210f22f50e445244f8becf87311a310ccb58b5abedd26d53ef9549b7ef2e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7831 16136 bytes