Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c34546f563a5843…

MALICIOUS

PDF

71.0 KB Created: 2020-08-22 12:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd31ec5e0bd94846b1ba38a562119b3f SHA-1: 21b40f308b597349ae31162b5ef9dd57892fd69b SHA-256: 5c34546f563a5843e1adc5c8ce399daea9795778368ad2d689248c87850d1dd9
154 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document also features a large number of external PDF links, suggesting it is part of a link farm designed for SEO manipulation or traffic redirection. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score strongly suggest malicious intent.

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=ganesh+bhajan+video++3gp
    • http://files.pt-educationfoundation.org/uploads/1/3/1/4/131408432/8438434.pdf
    • http://files.caroline-gibbs.com/uploads/1/3/2/6/132681463/bonirasede_zeletax_fiferaziwumuta_nisuto.pdf
    • http://files.firewiseconsultants.com/uploads/1/3/1/4/131454883/901795.pdf
    • http://sidugaza.marshallterrace.org/uploads/1/3/0/7/130739344/kowezobotilajolaj.pdf
    • http://files.queenbeehomemadegoods.com/uploads/1/3/0/9/130969800/f827b74.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/15620218436.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/income_tax_slabs_fy_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0434/8814/9668/files/86212604188.pdf
    • https://cdn.shopify.com/s/files/1/0430/6731/0231/files/16140479179.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5164/files/1107_west_42nd_street_richmond_va.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/ponapazum.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/jidowelesumaborezogipikij.pdf
    • https://cdn.shopify.com/s/files/1/0438/3889/8333/files/gexivi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5280/9888/files/73491054530.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/darodawivid.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_off0000d214.bin
8ed05e1a8557d8553b53c2fed91b6a35108d3369db2203945dd8691fbf4182d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD214 5564 bytes
font_01_sfnt_off0000e50f.bin
45083064bb2e5b00c7315fcaa56b39f114e7370821202c76da0a1b8d6d8beda5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE50F 13112 bytes