Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1733d5ab84ddca…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 18:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6ec60c13f3eacc960bf29a035ef53c5 SHA-1: 60f1e1ed6a4c813c45a121eac957428b2d230d67 SHA-256: 7e1733d5ab84ddcac7e943bf1c243d1643db55421873caff93a164121cba0b50
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=semi+truck+turning+radius+diagram', which is likely intended to lead the user to malicious content. The presence of multiple external PDF links suggests a link farm or redirection scheme.

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.club/wix?keyword=semi+truck+turning+radius+diagram
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_4985129fd57a4576b36b95f300dba106.pdf
    • https://static.usrfiles.com/ugd/ce5d00_0a8c0863687343688cde6bf73cc096a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_09714c9640e64a18a20a9b21644430a9.pdf
    • https://static.usrfiles.com/ugd/b56239_72798eeb6556471ca540b1783459c2e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_8cf43e065e294b7a97eba7cc46a053d9.pdf
    • https://static.usrfiles.com/ugd/79cb75_73b2e22ac26e42119ce91b914caf9467.pdf
    • https://cdn.shopify.com/s/files/1/0435/5679/8627/files/tixunupugo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7179/9449/files/88371000411.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/accounting_excel_templates_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_e224d62e4625486586df7525c34f32e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a542d162a5945f3b757918502827c7d.pdf
    • https://static.usrfiles.com/ugd/12f4eb_d0acbcd2116041bf9610598bc0e6d22a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b8570033c1c410996df5bb174229800.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_off00006306.bin
22182ae4ad2f93f5abb4e05875848d02174f0b41ef4a300ba2e8c2524de9d253
pdf-font-stream PDF embedded font (sfnt) at offset 0x6306 5396 bytes
font_01_sfnt_off0000753f.bin
43410c4faf21bcd445b32d3cbb097740b5f994a5f41c6e0ef43a9a320a3696db
pdf-font-stream PDF embedded font (sfnt) at offset 0x753F 12408 bytes