Malicious PDF — malware analysis report

Static analysis result for SHA-256 088430bc17e34aa5…

MALICIOUS

PDF

42.8 KB Created: 2020-08-08 09:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0f9aec229d258038bf0d885ad6695c2 SHA-1: 8be995aa1b9d4654a0497c4e631e46b1203b1f74 SHA-256: 088430bc17e34aa5ef89db00319140f7fbaada2ce98047a123641a40b68055bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to suspicious domains and are flagged as part of a link farm. One prominent URL, 'https://ttraff.ru/pify?keyword=polymerization+definition+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely 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=polymerization+definition+pdf
    • http://files.saintconval1359.com/uploads/1/3/1/8/131871569/f29de8db05.pdf
    • http://guzowoti.twigny.com/uploads/1/3/0/7/130776433/967bb3b654cda.pdf
    • http://files.seswamountedsection.com/uploads/1/3/2/6/132681460/sakogaraditifujabib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/86776030225.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/lonojuzusulubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/jakilafumosikimi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/1965472659.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/noledopatevoraraju.pdf
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/81544683416.pdf
    • https://cdn.shopify.com/s/files/1/0435/6587/5359/files/letters_and_sounds_gov.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/65458349583.pdf
    • https://cdn.shopify.com/s/files/1/0436/3550/7358/files/bokibubo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/xigad.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/liwatofesisirogoxowofalej.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/boyle_s_law_and_charles_law_gizmo_answer_key.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_off00006669.bin
e61cb0ab18d7685706501504138c392c1b3aa3c0160c9cd255475cfd5be4223d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6669 5160 bytes
font_01_sfnt_off000077f5.bin
37c5a92cd62042c6bb9f4ba61027d00717f433e920103a8120a9fafcbce242ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x77F5 10704 bytes