Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96fa44f8cfaf404…

MALICIOUS

PDF

79.2 KB Created: 2020-08-08 11:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e26a530e1e1700830f74c13969f1a73e SHA-1: f51f3c0af2064b129deaf7856d78aa61a4f3ed2e SHA-256: c96fa44f8cfaf404cf6a5ab154e332cd2cbfcf9f623ec8aa791e417e750a5d69
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for distributing malicious content. The document body text, though heavily obfuscated, includes the phrase 'Grupos paramilitares en colombia pdf' and the malicious URL, suggesting a lure to trick users into clicking. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation to increase visibility of the malicious content.

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.cc/wb?keyword=grupos%20paramilitares%20en%20colombia%20pdf
    • http://files.sweetalfas.com/uploads/1/3/0/8/130813887/juwekorosunuse-pamuzivaxibej-majigiwu.pdf
    • http://xuxodo.jordangospelministry.com/uploads/1/3/0/7/130776394/setenapukagi-sawarezumesavil-nuvawijoki.pdf
    • http://xesetizul.allsoulsreligioused.org/uploads/1/3/0/7/130740025/vutuvapoborel-fegofos-pisugizop.pdf
    • http://files.happyacresfarm.com/uploads/1/3/1/4/131407051/1766752.pdf
    • http://files.chesssaveslives.com/uploads/1/3/0/7/130775982/642eeab.pdf
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/sap_hana_administration_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/bersa_380_plus.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4996/files/wigawewuvoliko.pdf
    • https://cdn.shopify.com/s/files/1/0437/3492/5463/files/nimivalowokotexuxiviki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9059/2422/files/south_bend_heavy_10.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/zowoviminojozunesi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/rezukijofowuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5332/6242/files/lifed.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2254/files/31782983680.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2313/files/57030642727.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/metiliwetizo.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_off0000f623.bin
45f35ad17593c4fd73bbed7aea48b257491c6c03e50e2c11939578e5ccc024f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF623 5472 bytes
font_01_sfnt_off000108a4.bin
a5fef1a79c41c96315c7548464769bc29225e056585da387991a6339708d4110		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108A4 12176 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.