Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9997cc90794a64…

MALICIOUS

PDF

42.0 KB Created: 2020-08-30 17:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eaafe4008373d1d7c05144e7ceb39eb SHA-1: f326ab88a84b9a921e3ad3d4cc9bbf0a6cfcac5d SHA-256: 1e9997cc90794a64e5c6afe2e8ecc02a589cc1c44ebde2f9bbfad4dfb2861a78
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning model and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to further malicious content.

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.ru/wix?keyword=caracteristicas+de+la+imagen+corporal
    • https://cdn.shopify.com/s/files/1/0434/1923/8562/files/a_warrior_s_call_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/fadixadaxidaputuwafabapax.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/14538191116.pdf
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/colostomy_care_teaching.pdf
    • https://cdn.shopify.com/s/files/1/0434/2199/1079/files/2007_arctic_cat_650_h1_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6612/1623/files/26996091766.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/olaudah_equiano_livre.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/mejomebixafeluf.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4103/files/punurazirikexajakekak.pdf
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/mexegufenum.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6330/files/excel_home_budget_template_uk.pdf
    • https://static.usrfiles.com/ugd/b8c837_db717865b5ba41c1bcb094b2cef30467.pdf
    • https://static.usrfiles.com/ugd/6846fe_f0c5b579817e484da6c0ffc55601e49e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c9c9cb729df4c818de01045768e1714.pdf
    • https://static.usrfiles.com/ugd/b8c837_abe97db8667f451eb4f9fc76bc0e7710.pdf
    • https://static.usrfiles.com/ugd/87a178_b730c9e7f0d14e6f9a8deeb74e34c9d3.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b9.bin
aadc9ec8462d9624d23430558cad17360c266d14038c30bc3a41d0060425d0c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x62B9 5300 bytes
font_01_sfnt_off000074a2.bin
2484a69b4e405eef868314ca8632c9f3f61292e54943a7815863c38c1c5fe344
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A2 11224 bytes