Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf29c6b39fcd767…

MALICIOUS

PDF

70.7 KB Created: 2020-08-29 23:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee0d790982c595d110605ce1ac79f9d5 SHA-1: 770cf4d1d856ca27018986c30eed744edb0bb481 SHA-256: 4cf29c6b39fcd76767301f91e8996ada25c1c45a2ef4bee5a5d4b1c27bdd7108
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is a lure related to 'General electric profile stove manua'. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive document.

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=general+electric+profile+stove+manua
    • https://static.usrfiles.com/ugd/15cd4d_156b311e40f047a98ca35352e7e7f850.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab4ee2da73eb4312bf501c91e8755d75.pdf
    • https://static.usrfiles.com/ugd/b8c837_8561ea4ef212406ea4f6aa3007d15b07.pdf
    • https://static.usrfiles.com/ugd/b8c837_da5028f350dc4683a595fb0ca8d22376.pdf
    • https://static.usrfiles.com/ugd/3bca44_5114118652e5429e96fcf1369c060cc3.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/7252272360.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/99639887450.pdf
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/industry_analysis_report_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/unclaimed_property_new_jersey_reporting.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/5791364836.pdf
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/tapowufababapazotomele.pdf
    • https://cdn.shopify.com/s/files/1/0448/1178/0257/files/78106856636.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/putavufexunekugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/74032174468.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_off0000cc12.bin
a3d3fc7ddc32b8ff0e18a554521359092e50c65a31aba568438c81f7e7c08962
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC12 5252 bytes
font_01_sfnt_off0000dde5.bin
6f8a2b90b496e91774b01ce0b5edbaa2187b308ffeb7a47aa7331f508f39868c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE5 15160 bytes