Malicious PDF — malware analysis report

Static analysis result for SHA-256 05dc4cb08c6d8d17…

MALICIOUS

PDF

59.7 KB Created: 2020-08-22 03:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 230e513aecf32d9981fc7d19ef585df3 SHA-1: 36673dbe9f7e0da621e9d3c08b421b6e9d44fe1c SHA-256: 05dc4cb08c6d8d17691bfcef33414bf31eaa0b704269552c71de50bbb33ef440
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, indicating an attempt to lead the user to a malicious site. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the redirector link suggest a phishing or scam attempt disguised as a document.

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/pify?keyword=webmin+react+js+admin+dashboard+template
    • http://jorawetu.baak.ca/uploads/1/3/1/3/131380005/b590a2.pdf
    • http://files.prosewizard.com/uploads/1/3/0/7/130775221/dukivasibadupepowaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0899/9072/files/violin_scales_and_arpeggios_grades_6_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/toxod.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/zovusebuva.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/xenapetewutunigu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7670/5690/files/design_patterns_explained_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/eduardo_galeano_venas_abiertas.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/78639978566.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/13649205714.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/10557495204.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7850/files/how_to_report_intraclass_correlation_coefficient_apa.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_off00009e3e.bin
4060c651a6e12aef743a0adca31c6049b9f5c51297b61380548d41774ea67328
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E3E 5328 bytes
font_01_sfnt_off0000b027.bin
d7268e320e385c829fb8d8bf2b900570cddb64093fe583a59354c8d909cee5f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xB027 10296 bytes
font_02_sfnt_off0000d350.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD350 4324 bytes