Malicious PDF — malware analysis report

Static analysis result for SHA-256 669274fd20dd0ffd…

MALICIOUS

PDF

37.5 KB Created: 2020-08-11 16:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc8a5884bb6229bf1aac4ab02488adf7 SHA-1: 0796a3fda09712522fc3d7572f0ed7234c20c41b SHA-256: 669274fd20dd0ffdab1fca7f209b1254c6f3b226a080277bde0d89ee3df7504e
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The document body and embedded link structures indicate a link farm designed to direct users to external PDF files, with one primary link pointing to a malicious redirector. The embedded links are likely intended to lead users to phishing or malware distribution sites.

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=socialismo+y+comunismo+marta+harnecker+pdf
    • http://files.nouvellegraphicdesign.com/uploads/1/3/1/8/131856703/tobegegijew-zejomogepoz-xurixevukewan-fejufuguvo.pdf
    • http://foropagi.ecoinclusive.org/uploads/1/3/2/7/132740720/6859924.pdf
    • http://files.bizmark.net/uploads/1/3/0/7/130775413/mevesipufona_tituvuxe_wokisepowe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4485/5195/files/botijewivumoj.pdf
    • https://cdn.shopify.com/s/files/1/0448/3658/5629/files/augusto_boal_forum_theatre.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/export_file_cdr_to.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2289/files/kixarikenaresuxageke.pdf
    • https://cdn.shopify.com/s/files/1/0440/1761/4998/files/jofafobot.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/mejolelidejazuvogab.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/additionsverfahren_gleichsetzungsverfahren_einsetzungsverfahren.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/bapubijikovenafotizolon.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/the_juvie_three.pdf
    • https://cdn.shopify.com/s/files/1/0454/6861/4808/files/bettercap_tutorial.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_off000051a4.bin
d683614c97a31bbee6ba92f59a467130dc3bfc22a305f36c90ed03b1fed49c67
pdf-font-stream PDF embedded font (sfnt) at offset 0x51A4 5664 bytes
font_01_sfnt_off000064b3.bin
7377a91cda9ac23d9069bcb6db6284aa3d79b34ef58304cac1aa25fed79cac71
pdf-font-stream PDF embedded font (sfnt) at offset 0x64B3 10612 bytes