Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3cae8241f21cc6…

MALICIOUS

PDF

41.0 KB Created: 2020-08-20 00:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7d73945df99d9369e201a02f7cf129f4 SHA-1: 7fece22ffb7727bf49b4f1120d82a4b20f85844f SHA-256: 9d3cae8241f21cc646dad37b07b6ca794fe38fb418f5c7b3d50559b34c7bb2f4
162 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=java+7++filehippo In PDF document text
    • http://files.abbeykojima.com/uploads/1/3/0/8/130874610/dofufavajaxofigi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4542/9160/files/44096992774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6911/1448/files/89028491168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/hornady_reloading_manual_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/pejuvakimisadosupej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3521/4503/files/b._ed_syllabus_tnteu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/forubixovudonulunavovosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3903/8359/files/absorcion_atomica_de_llama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/jepudosomasezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9960/9505/files/60344455377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/29723001440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9717/6741/files/caltech_map.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6342 4844 bytes
SHA-256: bbb6ffe720b530ed9eea2dbed0afd7d6f3507314da5875b40b43e39666dcbfff
font_01_sfnt_off000073d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D0 10524 bytes
SHA-256: e460d280916b65d46ec41500f19570bd03ccd18f0e3e5a318801df6e1040dc1f