Malicious PDF — malware analysis report

Static analysis result for SHA-256 16208577e37ac5c7…

MALICIOUS

PDF

49.1 KB Created: 2020-08-30 04:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1de25420871dde9c1fcc37c978c856c6 SHA-1: 8ad137cff6f6271232341c8dbd6f3fddcd31625f SHA-256: 16208577e37ac5c7b03ce92dc73603ef8728b8b6cb01cbaeecd0d74d1667adaf
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.me/wix?keyword=shigley%2527s+mechanical+engineering+design+free+download'. This URL is presented within the document body, suggesting a lure to download content. The PDF also contains a large number of external links, many of which are benign Shopify links, but the primary malicious link is the most concerning IOC. No scripts were extracted from this sample.

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.me/wix?keyword=shigley%2527s+mechanical+engineering+design+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pobilimej.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/5113741464.pdf
    • https://cdn.shopify.com/s/files/1/0432/7348/6496/files/algebraic_identities_for_ssc_cgl.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
    • https://static.usrfiles.com/ugd/76156b_64ebb3b1c8f7458cbffee8079e52944c.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/mgaolo_fitness_tracker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0441/4459/1000/files/tokaduxilajowofukeru.pdf
    • https://static.usrfiles.com/ugd/0789d5_61f2a8a7d54441a9bfb049e570841563.pdf
    • https://static.usrfiles.com/ugd/2ac701_f3cce9f5c02244b8b56dbe2d45bb8a00.pdf
    • https://static.usrfiles.com/ugd/b8c837_fca20a2ffa5a433c9e4f573b849144fe.pdf
    • https://static.usrfiles.com/ugd/764aaa_3b996d237b9a4d5da101400d7f03cb70.pdf
    • https://static.usrfiles.com/ugd/f65518_23a6bf53ccdf4250a9971b11bca2d243.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_off00006a8a.bin
5ef8653de16978f40b07d01f4fce8c500892c4b033c47e81f994ff98069dd162
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8A 5764 bytes
font_01_sfnt_off00007e15.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E15 2116 bytes
font_02_sfnt_off000087df.bin
d51f2614b5452dc20405517a7f37654338c2692be8492396b846a3a376149656
pdf-font-stream PDF embedded font (sfnt) at offset 0x87DF 15404 bytes