Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ef5bd6c95ad133…

MALICIOUS

PDF

33.7 KB Created: 2020-09-05 21:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d7f9e9b42303b22c68a672399749820 SHA-1: 9995bf666b7cff5da57617ec365bb73466d6a790 SHA-256: 18ef5bd6c95ad13347e57a95c841b28ed71a800215d32b7a5a23288bd9e97ce8
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 numerous embedded links, many of which point to external PDF files. One of the primary links, 'https://ttraff.club/wix?keyword=photo+video+maker++apkpure', is identified as a known malicious redirector. The presence of a link farm suggests an attempt to manipulate search engine results or redirect users to potentially harmful content.

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.club/wix?keyword=photo+video+maker++apkpure
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0457/3931/1260/files/23652330941.pdf
    • https://cdn.shopify.com/s/files/1/0429/2771/8567/files/5789427166.pdf
    • https://cdn.shopify.com/s/files/1/0435/7236/3432/files/kukebuxel.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/magnetic_effect_of_electric_current_class_10_chapter.pdf
    • https://cdn.shopify.com/s/files/1/0432/1650/2939/files/16136881540.pdf
    • https://static.usrfiles.com/ugd/3b7182_788428fb249c43c09b9f5cae97b4ae03.pdf
    • https://static.usrfiles.com/ugd/e49726_141fb348708c454292a8a6cb9c9ba589.pdf
    • https://static.usrfiles.com/ugd/ce14f3_ade047032df843d788af8232fe56133a.pdf
    • https://static.usrfiles.com/ugd/70094d_6b0f0c7b436048a19a05dcef03499e9e.pdf
    • https://static.usrfiles.com/ugd/3bcfef_6e00570d03714191a695d02b0aff74ba.pdf
    • https://static.usrfiles.com/ugd/d5415a_9febf80c9da4479d958524c92bf4e839.pdf
    • https://static.usrfiles.com/ugd/cb4a18_f48c57276d4e4f0fb2965b2273814b0d.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/28599691485.pdf
    • https://cdn.shopify.com/s/files/1/0440/7987/4213/files/88163388037.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_off00004784.bin
4ea47649ce538a093e0520026abb75e8add0ae2d0150dddfc3a3db9032dfaed6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4784 5116 bytes
font_01_sfnt_off000058be.bin
710355cf32586b7fbddf826215e23a0c03f011b7619d90a49a0a42983a4e57e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x58BE 9848 bytes