Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4180c74772b04b…

MALICIOUS

PDF

49.8 KB Created: 2020-09-06 07:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28536f14f5cf531405642ef8b5832ddb SHA-1: 222b0965e5d16368a19da1fe10ed160ea6b72d17 SHA-256: 7a4180c74772b04b76e930e569cf214dda844527cd466c5168cb16af387c3e1e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, disguised as a client intake form. This suggests a phishing attempt to direct users to malicious infrastructure. The PDF also contains a large number of external links, indicating it may be part of a link farm designed for SEO manipulation to attract victims.

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.link/wix?keyword=facial+client+intake+form+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3b7182_27a8f491428548d2b23e8910a3d41478.pdf
    • https://static.usrfiles.com/ugd/5de1df_f11580e1a15849aeb2c89ad3571b367e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7cc99874ed64601ab3f186fd024d79d.pdf
    • https://static.usrfiles.com/ugd/8cbfce_177249d873344bc481fda32a2e264f54.pdf
    • https://static.usrfiles.com/ugd/c81504_28586466cb81440c97a3d0affdf984ce.pdf
    • https://static.usrfiles.com/ugd/67e251_79c5734f7f7c4cb4a086d3641857805b.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/95664163804.pdf
    • https://cdn.shopify.com/s/files/1/0430/4633/8709/files/766578053.pdf
    • https://cdn.shopify.com/s/files/1/0459/9155/9327/files/casio_illuminator_alarm_chrono_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/agriculture_statistics_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/fufutegazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/aeon_timeline_2_manual.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_off00008777.bin
2eb01277d0f3386f52ac73febf1ce5483b5f732b5c8d308984a0747ae4d30479
pdf-font-stream PDF embedded font (sfnt) at offset 0x8777 5004 bytes
font_01_sfnt_off00009869.bin
f63820564a6bbb9397283f2b63a1ee30743764584b3d9e62519ada1cfa6d62bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9869 10060 bytes