Malicious PDF — malware analysis report

Static analysis result for SHA-256 7caa12e77ea5108d…

MALICIOUS

PDF

46.4 KB Created: 2020-09-01 05:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34574eae88a349bb9427b3b4ded6010d SHA-1: f51699b2f14ecf39ca2acd1904b26378a0f5e154 SHA-256: 7caa12e77ea5108d0418d627dad949da3f8edcd822d48c911b4c90be63109f00
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 'ttraff.com'. The document body also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/wix?keyword=ac+dc+all+albums+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/personas_toxicas.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/a_level_biology_cell_structure_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/4514/9079/files/dalmatian_ears_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/5529/2317/files/aggie_war_hymn_sheet_music.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b60954656eb4c149fba766bfe93ab8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d8a2d61ca7443adb6fc1a05c5d2f4b2.pdf
    • https://static.usrfiles.com/ugd/d2751c_53a1808b73f24316a4bfb29dc46cd2e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_c112fd4767cd431aad59b708858221f5.pdf
    • https://static.usrfiles.com/ugd/eaf48f_5ca703595c3c4cf0bae638a596228d8f.pdf
    • https://static.usrfiles.com/ugd/cb2bed_715f6e2bfbee439bb6c5f55d5eaac4a4.pdf
    • https://static.usrfiles.com/ugd/e2b09b_9605bdd240194cf1b55558966e762623.pdf
    • https://static.usrfiles.com/ugd/d94ae5_c169a937eaa347c88a0976e70ae09d7d.pdf
    • https://static.usrfiles.com/ugd/af0aa9_cf410dbb7d71488489d1176c67dd6655.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_off000069a4.bin
f631f376c3804e4f4cd9666baddcc6fef7734337004805bb6438ba5f6e20b4a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x69A4 5296 bytes
font_01_sfnt_off00007b90.bin
dea125bb8c0a88cbd848ce33e66c5bd67ed275e2d6e9d98816d2d5768c9164bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B90 15744 bytes