Malicious PDF — malware analysis report

Static analysis result for SHA-256 64156ecdd96f8743…

MALICIOUS

PDF

44.3 KB Created: 2020-08-25 11:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31271980de51a2aa3e7588e069af6963 SHA-1: ad7f6ebd5c26923edb5afa12239e07835121c1f7 SHA-256: 64156ecdd96f8743532564eb32a4e62a0d7cd286103fe6b937c3fe2987ac2404
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link and a large number of external links, many pointing to Shopify, suggesting a link farm or SEO abuse. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content is designed to trick users into installing something, likely malware. The primary malicious URL identified is a redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=firefox+version+52++32+bit+filehippo
    • http://zidofi.khalidshadid.com/uploads/1/3/2/8/132814969/760148.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0461/9829/2638/files/debussy_arabesque_no_1_free_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bojakotipizijogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1272/6677/files/bomuzorixapaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/ziloxozugesefox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/rinutowabe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/warexevo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3778/4224/files/how_to_disable_wmi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/27631865885.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/wordpress_image_upload_http_error_godaddy.pdf
    • https://cdn.shopify.com/s/files/1/0439/2353/8088/files/92544718064.pdf
    • https://cdn.shopify.com/s/files/1/0432/0015/1707/files/sanitary_pipe_fittings.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_off00006e72.bin
6d4f86c38902f4538344fcf540b1745a719001267c1c5173cabaf9b3db147a5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E72 5424 bytes
font_01_sfnt_off000080ee.bin
a9adff4cd6377955bd17b1f20b9b5343c44a17ccf990b7331b3fac1ca75d3052
pdf-font-stream PDF embedded font (sfnt) at offset 0x80EE 10300 bytes