Malicious PDF — malware analysis report

Static analysis result for SHA-256 60218eb812c89e32…

MALICIOUS

PDF

48.2 KB Created: 2020-08-09 12:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0086dbb954e446ff73c77c78016f17e6 SHA-1: 2e384f05ca13391ebd51d6e3db9e3a20187b60b4 SHA-256: 60218eb812c89e323fb55fa3c55055c024fb393af9441acdabef69b5fce8a415
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=ace+online+test+series+pdf
    • http://files.sarahwyldphotography.com/uploads/1/3/1/4/131483955/muwipedibelik.pdf
    • http://files.willowwildedges.com/uploads/1/3/1/8/131856443/xukopiwome-tojazelapiz-kasivezobisu-sunezurawuse.pdf
    • http://files.oeufrier.ca/uploads/1/3/1/6/131636702/151821.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9479/3635/files/jquery_validation_bootstrap.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/32625180966.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/88890398401.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/digake.pdf
    • https://cdn.shopify.com/s/files/1/0432/3649/1431/files/im_autoconverter_for_accel_platform.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4807/files/zunekugobasuvavumekoresa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0184/7708/files/pevuxemekogamanodurowevo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4294/files/online_editor_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/undo_last_commit_github.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8372/files/69600993646.pdf
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/48461658765.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_off00007f4a.bin
eef938d425168c197aa2f4d9ac5f45061e7c4a4cc0f95ca6a30ac0a631be42ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4A 4928 bytes
font_01_sfnt_off00009022.bin
24edbacb9fb730322ff4198b9bb7a05c4019d7d1876e410d17df5d851f69a3fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9022 10604 bytes