Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced200135aedaec3…

MALICIOUS

PDF

42.6 KB Created: 2020-08-24 00:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d03dad12288a6f094e5953effed7cd44 SHA-1: 5eee43f763b16436400c9693aa31e93b7a3741f7 SHA-256: ced200135aedaec3cb7df3827dac6a03659526153bf0de8be14e95765453d7b3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though corrupted, contains text related to a medical topic and the malicious URL, suggesting a lure to trick users into downloading further malware or visiting a compromised site. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are likely part of a link farm to improve search engine ranking for 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/pify?keyword=cancer+de+piel+diagnostico+y+tratamiento+pdf
    • http://gezutam.stfrancisbing.org/uploads/1/3/0/7/130776262/eced8d7.pdf
    • http://files.cottageforrentontario.ca/uploads/1/3/1/0/131070469/sozifupoxojowi.pdf
    • http://vemifime.harvardseducation.com.au/uploads/1/3/2/8/132814084/1257081.pdf
    • http://files.neverlostestore.com/uploads/1/3/1/3/131380728/nimokixaraka_wakifol_wesaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8748/7385/files/highway_capacity_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/falazipufefiwiwawik.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/frecuencia_respiratoria_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/teachers_day_speech_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0464/6862/8630/files/formel_til_areal_av_sirkel.pdf
    • https://cdn.shopify.com/s/files/1/0465/0070/8510/files/ucla_ranking_us_news_world_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/6237/8152/files/demuxufaxaxijuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/toduwopupufoninifi.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_off0000680f.bin
fa3a5b8e495ae596a16d63d432f0d314077536962f2f55e4bd523d6fd9aa7e5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x680F 5484 bytes
font_01_sfnt_off00007aa3.bin
1079104b3dd9a548ffc5cc8b0602337b21befa5e954710cc4e800cf9ea059438
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA3 10240 bytes