Malicious PDF — malware analysis report

Static analysis result for SHA-256 760237230bf3de6b…

MALICIOUS

PDF

47.7 KB Created: 2020-08-31 20:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f7140b4614a9e6805dd468256a18f7a SHA-1: 8b1a4aee2c658964880ceb100525f6b9a4600ba3 SHA-256: 760237230bf3de6b962300fd01b636f27a2a0a837cddcc038c0083f075aad00a
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for free embroidery designs. The presence of multiple PDF links, including one to a redirector, suggests an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=free+machine+embroidery+designs++pes
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/36814523264.pdf
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/60837323894.pdf
    • https://cdn.shopify.com/s/files/1/0435/2665/2055/files/geometric_706_font_family_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/1310/4028/files/35620783602.pdf
    • https://cdn.shopify.com/s/files/1/0436/8865/7051/files/garusumefurobudeke.pdf
    • https://static.usrfiles.com/ugd/2c608b_50465250401749eeb633f6d3b43b002f.pdf
    • https://static.usrfiles.com/ugd/6116da_024693d09c1e4fdd873184e44a08d931.pdf
    • https://cdn.shopify.com/s/files/1/0431/7023/4519/files/beka_boy_mpya.pdf
    • https://cdn.shopify.com/s/files/1/0436/6086/9785/files/jesus_loves_me_too_much.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/pimogutug.pdf
    • https://cdn.shopify.com/s/files/1/0439/4339/5483/files/pstet_2020_result.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_off00007be4.bin
8fca328e5f3e4510209575df328b0ce0a23c0f38887c86749fe788115de8f3ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE4 5652 bytes
font_01_sfnt_off00008ef0.bin
8a0fcfa083c595d811efc3f7eea46dec48bab0af6f1bf554e8acd3f46f52c363
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF0 10352 bytes