Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5724fe9d2ae7167…

MALICIOUS

PDF

72.8 KB Created: 2020-10-04 23:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9a682b215b6d94461b6a562b875031e8 SHA-1: fa539a9d031b4cda09decc6b3aabad2945b4e46b SHA-256: c5724fe9d2ae7167ff7b7d9aac9bb0e99e8368fab91adc3a2030f978475c5d3f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of numerous external PDF links suggests an attempt to create a link farm, potentially for SEO manipulation or to distribute further 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.link/pify?keyword=9mm+effective+range+carbine In PDF document text
    • http://files.trainthatdog.com/uploads/1/3/1/4/131438114/d1861e9984323a.pdfIn PDF document text
    • https://site-1036838.mozfiles.com/files/1036838/rubeted.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/6238704224.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d42df0-eb3c-4f66-ab11-34ce7bea9cb7/funoselaxavurunotik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e2bbb0a-6fb5-4e1e-82dd-4b0f2421852d/fekozatijodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40f09e6a-e956-4fd5-b6bb-bb319d60b665/71279741621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ef17dd-31e5-4500-baf6-5b6e6aa6b87e/35652083711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6339e891-d2b8-4030-b2b6-6cb3b343f13d/padan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b679cee-82e0-47e7-9b6e-85da786fdcbc/65440435290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/034308cc-f2cb-46e2-aff2-952f92500058/57227642989.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82F 5252 bytes
SHA-256: ccbc92be890c3c4b4b8efb12a8b19abd07a7406f6a493bf2e72a51cfef417094
font_01_sfnt_off0000da05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA05 12324 bytes
SHA-256: a6433d514dfa9bb5b7424d5d979b7c01129d170c55f946181a2649cad0f58787
font_02_sfnt_off00010167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10167 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833

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