Malicious PDF — malware analysis report

Static analysis result for SHA-256 80394f942ad1b8c4…

MALICIOUS

PDF

79.4 KB Created: 2020-09-06 20:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e74548d49dc031707aba9c60477b9280 SHA-1: 3b566c8dd200b5ebb249ea67efb72a0be5487b42 SHA-256: 80394f942ad1b8c41e2ea5adcc29d9e45b3c7e5637936eadf8f1e71ae9aebb9f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=corr+submission+guidelines'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=corr+submission+guidelines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/6483/6764/files/61111772269.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/the_cell_a_molecular_approach_7th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/android_ambient_display_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0436/4563/2665/files/34788824516.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/15161611928.pdf
    • https://static.usrfiles.com/ugd/7dfe85_0c98a7f7984c45e5b65e4666cd5b3efd.pdf
    • https://static.usrfiles.com/ugd/5ed537_6a2c7ee52c4c43c4b9e9f5608100454a.pdf
    • https://cdn.shopify.com/s/files/1/0435/4654/2229/files/73233747818.pdf
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/39621218218.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/99013949857.pdf
    • https://cdn.shopify.com/s/files/1/0432/6640/8603/files/45436057464.pdf
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/why_not_me_mindy_kaling.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebdc.bin
fab07d7727e7027af01b278e9b49ff774a7550f29471560422cf3969fa4512d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDC 4900 bytes
font_01_sfnt_off0000fc57.bin
63a286832b9a5cd7adb4917a6bda7c49f2099aa237e016fe082374a763a56a75
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 10668 bytes
font_02_sfnt_off000120d4.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x120D4 4324 bytes