Malicious PDF — malware analysis report

Static analysis result for SHA-256 719ba5b150abc807…

MALICIOUS

PDF

39.1 KB Created: 2020-08-28 23:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7f8fba133326bd64562d5bb51d2c796 SHA-1: ec9980ea423aea47349461dc019507292023f64c SHA-256: 719ba5b150abc807c9c486050f0f391dee767f1053db1f02f959d21cdff54ade
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, embedding a large number of external links, many of which point to Shopify-hosted PDFs. The document body contains the title 'The door in the wall' and the malicious URL, suggesting 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/wix?keyword=the+door+in+the+wall
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2383/4011/files/ontological_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/bozazuzetejovotuxokag.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/57282297096.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/40970185116.pdf
    • https://static.usrfiles.com/ugd/b8c837_878ff843bf164f8ea95cb9039d221256.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/19301167299.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4693/files/basketball_rules.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/tree_diagram_for_probability_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6841/files/90555458189.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e384b9c7a9c4e21b02b4c9a1b75ccd0.pdf
    • https://static.usrfiles.com/ugd/b8c837_d72bf1bb1da8404abea58e9d5f721bac.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d88feceb1d34f07a902010f38dc25c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_22fce6fc27c9450e922b808bbd7a702b.pdf
    • https://static.usrfiles.com/ugd/b8c837_86d72fb87252438da66d9ef3052ab444.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_off00005dc8.bin
1f99aa9f4b3692504a21c600b3421bb1eb62955fd5a0fef1c6428696c347228f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC8 4776 bytes
font_01_sfnt_off00006e09.bin
674550e0a9a721950b33b957d3505d88b10f84ea65d507082ca914b2fa5193c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 9932 bytes