Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6af701ec0325e7…

MALICIOUS

PDF

48.9 KB Created: 2020-08-30 00:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f02a6460620f007d249d7f5b7e16bea SHA-1: 25183b05c463ef1e0476f1d006c1d04f4700724c SHA-256: 6b6af701ec0325e78fb5cca126a7e2659bee0bf2bc2e02d644729ec92c37050e
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for malicious redirector links and a link farm of numerous external PDF files, indicating a potential SEO abuse or content hosting scheme. The primary malicious URL identified is https://ttraff.cc/wix?keyword=badinage+trumpet+pdf, which is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct users to malicious infrastructure, possibly as a phishing or malware distribution lure.

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/wix?keyword=badinage+trumpet+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/6979/2668/files/zarofojukam.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/before_after_between_numbers_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/color_blindness_test_chart.pdf
    • https://static.usrfiles.com/ugd/9e53d4_d86a0898ad4342cc89d1f2b7b73d3bda.pdf
    • https://static.usrfiles.com/ugd/912de2_d027109f84864f99b0096beecf5d9c0a.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_e77fb224d9f44a3d99388c029e675a80.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b1e24127d5c4175b889c175a960c520.pdf
    • https://static.usrfiles.com/ugd/dad90e_592d9e95676048fb8a71f6981067f425.pdf
    • https://cdn.shopify.com/s/files/1/0440/9524/2392/files/percy_hedley_school_ofsted_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/14250658357.pdf
    • https://cdn.shopify.com/s/files/1/0434/6209/9097/files/gafuvelivusotovanato.pdf
    • https://cdn.shopify.com/s/files/1/0434/8536/4390/files/jupomotatefinolikug.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/pibolukurisisogorabu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6984/files/tilogosupibaz.pdf
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/samojexad.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/5061248690.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007583.bin
c494c8eeab107f89c779aec81ce424f6d305e59dd62dd4c12b079defe55ffbb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7583 4972 bytes
font_01_sfnt_off0000864a.bin
7e9326540efa9671495a50f7f88086cda428df07503a08df7b1a2c0f8ce990cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x864A 10060 bytes
font_02_sfnt_off0000a87d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA87D 4324 bytes

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