Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e80b86bb46adb1…

MALICIOUS

PDF

42.1 KB Created: 2020-08-30 10:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4752334fc4661bd83fec58972c6d277 SHA-1: 2ac96eacc2e01391a3421deaa496c6ac31c31287 SHA-256: 83e80b86bb46adb1252c888081d2a9a4cb9fb0d11a9d0f95aea9e246e0cfbda1
154 Risk Score

Malware Insights

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

The PDF contains a lure for "wifi map passwords" and embeds a link to a redirector URL, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

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/wix?keyword=wifi+map+passwords
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0458/5770/2041/files/.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/mufifiris.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/74936602214.pdf
    • https://cdn.shopify.com/s/files/1/0432/1771/5361/files/55036723598.pdf
    • https://static.usrfiles.com/ugd/accd1f_6586db7f2a5e4546a27839d8cf5b0224.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e6b8844d98247528f9cf891eecaea00.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8c3f96b8e13470b834a4425a36cae95.pdf
    • https://static.usrfiles.com/ugd/b8c837_b110cfcaee064105be01a87234f9ce4e.pdf
    • https://cdn.shopify.com/s/files/1/0450/4656/2966/files/african_country_capital_and_currency.pdf
    • https://cdn.shopify.com/s/files/1/0434/0334/6078/files/45732835371.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9300/files/medicare_benefit_policy_manual_chapter_7.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/call_history_details_app_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/12146828094.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_off00006561.bin
dad6f874c87cc1d89571e2012c48a91337c2044fcd67d1a5ce8b3fb0a17b07ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6561 5260 bytes
font_01_sfnt_off0000773f.bin
276d8a2eb914fa0be2ec44de61a1cbd77a38c0490ea4c12ec5c052e01278a531
pdf-font-stream PDF embedded font (sfnt) at offset 0x773F 10728 bytes