Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b39d5572a52bb3…

MALICIOUS

PDF

45.0 KB Created: 2020-08-04 03:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bc2131a32a72dd4325417b62adfd779 SHA-1: 71c44a7ecfa8f21a368696b7b8e5e9cb557925ad SHA-256: 12b39d5572a52bb3009dc29058a9a4078b8d0d7b68b75823087caaf4e44a5a93
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed to generate traffic and potentially lead users to malicious sites, as indicated by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious link directs users to a redirector service. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to exploit users through deceptive content and redirection.

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=class+diagram+problems+and+solutions+pdf
    • http://files.hummingbirdmedicineboise.com/uploads/1/3/0/7/130775828/6eeef6619c2a6b.pdf
    • http://files.hernanbrizuelatango.com/uploads/1/3/2/7/132740743/8798325.pdf
    • http://files.drbhatti.ie/uploads/1/3/0/7/130739430/pibabifirunaf.pdf
    • http://files.nationalschoolartcollective.org/uploads/1/3/0/7/130775280/486733.pdf
    • http://files.ricowhite.co.uk/uploads/1/3/0/8/130814411/8161481.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/rorepoporonuweja.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/pozijejon.pdf
    • https://cdn.shopify.com/s/files/1/0428/3619/7542/files/17248617275.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2904/files/what_is_hardware_acceleration_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/how_to_delete_ark_mods.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/82495894476.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55781022724.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdf
    • https://cdn.shopify.com/s/files/1/0438/0344/3361/files/60362309666.pdf
    • https://cdn.shopify.com/s/files/1/0435/3160/0031/files/msp_hack_no_download_no_survey.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_off000069cc.bin
0d2bf2c5e040d080d8e5c00f62964211a9377c8749dfbd917978b704a66ffd70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CC 5404 bytes
font_01_sfnt_off00007c0b.bin
6c55bb16a75f13edf14704031053d7fd9b9be35415bafca715756231c56526ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0B 13520 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.