Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f3e5e5e4cde09b…

MALICIOUS

PDF

38.7 KB Created: 2020-08-17 17:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdac69cf0c61f3a259d17a5be19b9af3 SHA-1: 3757b346736bdc382ce8f71bcae3ce6e4bc3754b SHA-256: 45f3e5e5e4cde09b21762c33806f12298e129a53478b1b653d5f7b3447a59165
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com, under the guise of 'Corona extra nutritional information'. This indicates a phishing or redirection attack. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL and the PDF structure suggest a lure to a malicious site.

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/pify?keyword=corona+extra+nutritional+information
    • http://files.beardedmaverick.com/uploads/1/3/1/4/131437949/sunefusirita-siwumovaf-midomekikez.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/jatev.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/trastorno_bipolar_dsm_v.pdf
    • https://cdn.shopify.com/s/files/1/0438/3876/7266/files/annotate_ipad_pro.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/52674699677.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/beloziresuvon.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/accuweather_norfolk_ne.pdf
    • https://cdn.shopify.com/s/files/1/0435/6482/6773/files/o_que__reviso_bibliogrfica.pdf
    • https://cdn.shopify.com/s/files/1/0429/4773/9811/files/portland_hourly_forecast.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_off00005bf5.bin
215bb8fe20989b4e77fcd962ad94d837c11527d6461ec3f7dfd9da1da289603f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF5 4708 bytes
font_01_sfnt_off00006bde.bin
3c70b0b9e3084cde7d1dcaa9a837e2d6ee194e62b7d36f5804ce5ea23e691fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDE 10060 bytes

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