Malicious PDF — malware analysis report

Static analysis result for SHA-256 13cf30eaf3115277…

MALICIOUS

PDF

47.5 KB Created: 2020-08-31 06:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3ab7482780f249a30e57c28747ecde4 SHA-1: 30cadac7587a421bfa4bd08d9ad60a3cbc5fc890 SHA-256: 13cf30eaf3115277d2334464e07ac0abf50a8a6f080057f0e262de16791e5676
154 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous embedded URLs, including a primary redirector URL. The document body text, though partially obfuscated, contains the same redirector URL, suggesting an attempt to lure the user to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the presence of multiple links to potentially benign Shopify domains alongside a known malicious redirector suggests a watering hole or phishing attempt.

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.cc/wix?keyword=ley+22+de+transito
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2180/2404/files/rope_rescue_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4963/2412/files/zufikuxomiroluvebabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0110/1984/files/21325561185.pdf
    • https://static.usrfiles.com/ugd/8b9728_d30c8afd93324316b3514929fae0f7a0.pdf
    • https://static.usrfiles.com/ugd/cd79e3_a39573735c1b406b80b1d6c1c3684220.pdf
    • https://static.usrfiles.com/ugd/345929_097c0e01386c4658ac85767a569820fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c6641363833409b82816d758d0509e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b03186a7889a48b0953badab8c95f49f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e175e5fc7a024085aeb4e680d025616e.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4355/files/wifatetarubumimidosodol.pdf
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/sulelonaxo.pdf
    • https://cdn.shopify.com/s/files/1/0462/7372/4576/files/30140173562.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2657/files/fmea_template_xlsx.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/starting_out_with_c_early_objects.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_off000076db.bin
3f80e85bd1ccec1c646fbb0865ca5687c791fadf1e179190fc76b87fe64ac528
pdf-font-stream PDF embedded font (sfnt) at offset 0x76DB 4964 bytes
font_01_sfnt_off000087d1.bin
f3f92dc3e574f1820733fc6a56839d3658aefa8d7cd424397f3fed3c3c504331
pdf-font-stream PDF embedded font (sfnt) at offset 0x87D1 13268 bytes