Malicious PDF — malware analysis report

Static analysis result for SHA-256 10174e7a60439d63…

MALICIOUS

PDF

39.0 KB Created: 2020-08-21 15:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ee3a7c22d61bce427eb6d8402373d98 SHA-1: 3ba0e53e9f5638d43f3dcbc2029d1f3071f056c1 SHA-256: 10174e7a60439d63062eee97c9d12d554a98b6e01f3b28cc4e47005562ba44ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure to download further content, likely malicious. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=livro+boca+do+inferno+ana+miranda+pdf
    • http://sejumin.retailresumes.ca/uploads/1/3/0/7/130739430/sopuzofim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/48990779754.pdf
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/bioetica_concepto.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/adjusted_net_present_value.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdf
    • https://cdn.shopify.com/s/files/1/0441/3577/6408/files/34737732471.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodupenewizaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/vovoroxoxadede.pdf
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/35941835248.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/13275879127.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/ninujofejamagozofapumad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/pusaxexedifikujujex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a98.bin
dbbb8b101f7904541bfdd6cec0cd6a3f2178f3e5649b98f8b8ce2307cae97965
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A98 5232 bytes
font_01_sfnt_off00006c52.bin
356b5bb1c0f55531531cb2789ddc8e19e9ca12381ca892a46c9dd815571c9241
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C52 10204 bytes