Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e13cd53287007b2…

MALICIOUS

PDF

42.6 KB Created: 2020-08-19 03:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 534069e7b6c66620f9df415d1cf0c2d6 SHA-1: 550490787c4b361d11c24cea5db1dd1b425b3dea SHA-256: 5e13cd53287007b2f952fa392b83c073f1dd5967ce8b0c0080f8244b530e9757
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Certina ds first manual' and includes the malicious URL. The heuristic firings strongly indicate malicious redirection and link farming, suggesting the document is designed to lead users to harmful sites.

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=certina+ds+first+manual
    • http://files.hellorichmond.org/uploads/1/3/1/4/131409794/jokupe_sawox.pdf
    • http://files.lincolnfencecontractors.com/uploads/1/3/2/6/132681938/7c5f525598fb.pdf
    • http://nipoli.jb-long.com/uploads/1/3/0/7/130776791/8972101.pdf
    • http://files.shellybroughtonart.com/uploads/1/3/1/6/131606397/fuvivin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/linux_administration_course.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/34160994684.pdf
    • https://cdn.shopify.com/s/files/1/0432/7964/6878/files/jupupub.pdf
    • https://cdn.shopify.com/s/files/1/0437/2001/6021/files/31650853463.pdf
    • https://cdn.shopify.com/s/files/1/0434/7851/5864/files/kobebajizikipewataxojixup.pdf
    • https://cdn.shopify.com/s/files/1/0438/6675/1131/files/michigan_vehicle_bill_of_sale.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/93459568334.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8150/files/79923599565.pdf
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/72112255514.pdf
    • https://cdn.shopify.com/s/files/1/0439/4565/6488/files/wimakurulemiruxanixewo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/base_de_dados_2.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_off00006840.bin
07153ab8b42979683722bf88cdd9cf8a11ba9fcf3dda419efd2a7389a672ef2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6840 4960 bytes
font_01_sfnt_off000078fd.bin
20e97a0b23ae25ecae69bf87803869c8c26fa6af5ebe6e283f81297a077cd5c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x78FD 11040 bytes