Malicious PDF — malware analysis report

Static analysis result for SHA-256 0271ed72f5f52621…

MALICIOUS

PDF

47.0 KB Created: 2020-08-20 18:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9cfef275f355fb79d0799025af23c13 SHA-1: f50e56c59fc4eb260875d2ed5fbe60a57329b923 SHA-256: 0271ed72f5f52621973738a955e004b52077f3447d59ab8d36dda30dbcbca9a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass external link farm, with many links pointing to Shopify-hosted PDFs, likely as a lure. One of the primary embedded URLs, https://ttraff.ru/pify?keyword=django+template+load+static, is identified as a malicious redirector. This suggests the document's purpose is to redirect users to malicious infrastructure, potentially for further exploitation or phishing.

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/pify?keyword=django+template+load+static
    • http://files.spiritualfringe.com/uploads/1/3/1/8/131856435/xizosutomenij.pdf
    • http://repupol.creativegeniuswithin.com/uploads/1/3/0/8/130874030/1345278.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/accounting_and_finance_research_proposal.pdf
    • https://cdn.shopify.com/s/files/1/0434/7068/4317/files/investigative_report_writing_software.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/jazz_blues_chord_progressions_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/83520983173.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sigejorivuzogekos.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/p185wjd_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5294/0968/files/bozokabimowamiwepobusenir.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1449/files/6082189559.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/simplifying_algebraic_expressions_worksheet.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_off00006c6e.bin
d81a1fc349b042e05e8ad70df179fcd7156ad648e533c5bcb6615f469ed16b8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6E 5372 bytes
font_01_sfnt_off00007eab.bin
8672311c2456e9be88da63ae50353e9f8e3ad66343c98a4f0e4df5a40f96518b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAB 15768 bytes