Malicious PDF — malware analysis report

Static analysis result for SHA-256 64de0d0d98fbf3bd…

MALICIOUS

PDF

40.9 KB Created: 2020-08-03 14:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c05e23191aaed6cc5e22301641bd4aaa SHA-1: d6fb9c4577551d614c0120243e928621bc3c2947 SHA-256: 64de0d0d98fbf3bd81fded1efe698e89782933217af7c84794b8791c1915345c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is part of a link farm or phishing campaign designed to redirect users to malicious sites.

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.cc/pify?keyword=container+gardening+pdf
    • http://files.glencoeflorist.co.uk/uploads/1/3/1/4/131483128/jizomupopiwo_tujovaw.pdf
    • http://files.susankong.com/uploads/1/3/1/4/131482931/zebevigusalerev-gagaruditegegu-lutebef-nukujip.pdf
    • http://files.balshamreview.com/uploads/1/3/1/6/131606546/dululejofe_difiporor_gidifotuvatij_figolu.pdf
    • http://files.shubayr.net/uploads/1/3/1/3/131379591/7062163.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8170/2303/files/sajeloxibu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/vakazewasatuwejon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifivejeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/16198950832.pdf
    • https://cdn.shopify.com/s/files/1/0428/1958/4166/files/jefuzofoxodavositimup.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/zifawajerokuzilejuberoru.pdf
    • https://cdn.shopify.com/s/files/1/0438/4115/9333/files/xofemesixijo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/13428276358.pdf
    • https://cdn.shopify.com/s/files/1/0429/8201/5129/files/difemonagisafitegegaloma.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/malofivigupokadorozefa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/zapapux.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_off000063df.bin
1f9f848794a80c11a7e803c5aad142367a76cb7dee1ebb56e2d6b597981461f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x63DF 4904 bytes
font_01_sfnt_off0000749e.bin
0928124d7428240887d9f5a044ad331dabf37a0f09bc6bb39efc2f427defdda4
pdf-font-stream PDF embedded font (sfnt) at offset 0x749E 10036 bytes