Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe85d43b9eda363…

MALICIOUS

PDF

42.4 KB Created: 2020-08-29 20:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6362259bd86c11469fa5acbadea92732 SHA-1: cc74a90a6ae77d5a6fbc44027736f6751632d811 SHA-256: 6fe85d43b9eda363db0eb4a85d1c618e9d0d0b754ce537f4beec672c1bdc5722
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are to Shopify. The primary malicious URL is likely intended to lead the user to further malicious content or phishing pages. The ML classifier strongly supports the malicious nature of this PDF.

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=cummins+qsm11+life+expectancy
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0461/7548/6115/files/bible_concordance_kjv.pdf
    • https://cdn.shopify.com/s/files/1/0460/3743/4532/files/keyword_planner_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/zezuxado.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/quimica_inorganica_housecroft.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8074/files/68758120269.pdf
    • https://static.usrfiles.com/ugd/b91566_4a8fb02aefbc46fdaba575e3d89333ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_68deb2993345474ea8b91d98a72facf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0580a59b5d24efdaaf91aa64aa08d9c.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/jexeronedikuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2559/6573/files/45697400375.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.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_off00005f3c.bin
f62980b74ebeddd7f2ef2f06d85240fc41f69f345009fb142ffa6531b9800ec9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3C 5320 bytes
font_01_sfnt_off00007159.bin
9a5145ca37a8144c28c3bf40e68911b835416fa9f98d3f7783b91c05895bef94
pdf-font-stream PDF embedded font (sfnt) at offset 0x7159 14352 bytes