Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd3484b6b3e42e4…

MALICIOUS

PDF

43.2 KB Created: 2020-08-18 17:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acaeebf6f0a0d9f92650d5ec133057b3 SHA-1: 2271f15329994b66f4b64ecde2a846bbecd2826f SHA-256: fcd3484b6b3e42e4ef651854e973d2fc7e92127730b81ae4d6aa8c50fa7290ac
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=matthew+ashimolowo+books+free', is likely used to redirect users to a malicious site. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, some of which are hosted on potentially suspicious domains. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=matthew+ashimolowo+books+free
    • http://luziweto.hbpaspokane.net/uploads/1/3/0/8/130874090/1f8a5d005109457.pdf
    • http://zusirapaj.skolen.online/uploads/1/3/0/8/130874376/mituwumefote_kakonivatuk_pafomezesozaji_fumiguxumekarun.pdf
    • http://fupigipul.ewrcarter.co.uk/uploads/1/3/0/8/130814397/9236108.pdf
    • https://cdn.shopify.com/s/files/1/0440/7109/2376/files/memoire_de_licence_en_agronomie_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0439/7950/5822/files/cute_newborn_babies_images.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/shallow_copy_vs_deep_copy.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mijafovaginidobu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3089/4999/files/xakituziledizote.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/jejiwiberif.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/bagevonoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/3670/3900/files/universal_sunroofs_kits.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7730/files/antihistaminicos_en_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/bosquejos_para_predicadores.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/11316374919.pdf
    • https://cdn.shopify.com/s/files/1/0441/4049/5000/files/45764973821.pdf
    • https://cdn.shopify.com/s/files/1/0436/0624/5539/files/43343728022.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b35.bin
c591ad2195701a6d8e679d0df337e46ae17461a76ada721e5e1496853423b6c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B35 5308 bytes
font_01_sfnt_off00007d3e.bin
7dd74688dad6b36b2c3219e9525e4ba29608c77a663953b40b2c4faed9dfe214
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3E 10048 bytes