Malicious PDF — malware analysis report

Static analysis result for SHA-256 84281112129f8c2c…

MALICIOUS

PDF

41.4 KB Created: 2020-08-22 11:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7afc6eec01f67fdd9559d78fa5d3fd7f SHA-1: cb573821270dd33847b2d9b56fbabe4009b914ac SHA-256: 84281112129f8c2c5899d52361b29b7506e6d5fbfb6c7815766a781af729c344
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a meme template. The document body and embedded URLs suggest a lure to a malicious site. The presence of multiple embedded PDF links further indicates a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=homer+simpson+bush+meme+template
    • http://lemimaxid.rubypurplecreations.com/uploads/1/3/2/7/132712416/7de6ac630527b.pdf
    • http://files.ellibrodeespanol2.com/uploads/1/3/2/7/132712096/duseresadomadetoroj.pdf
    • http://files.east-pto.com/uploads/1/3/2/8/132814611/vedabuvopobej-fakuwud-vomaba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7786/0516/files/rasenonur.pdf
    • https://cdn.shopify.com/s/files/1/0436/9770/1032/files/25267820234.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/waiting_for_table_metadata_lock.pdf
    • https://cdn.shopify.com/s/files/1/0438/0963/6512/files/dibujarte_s3.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/piboroso.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/ahmet_hamdi_tanpnar_huzur.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/wonosofaximopuzewise.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9772/files/manual_catia_v5_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/pipinalodavenegadufeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0600/files/51749911832.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_off00006497.bin
8369cc5642390459f6535d24c7e09a0d5055fc5b4b63ffc2ee22bbb4305a76ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 5160 bytes
font_01_sfnt_off000075e8.bin
f2180a09022e632bc29ee52b437affb3146379d0430a2d91ec90213267482a89
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 10256 bytes