Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0204e79caf3813…

MALICIOUS

PDF

50.6 KB Created: 2020-09-19 02:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cbc0507dda3ad048435417b0f127a21 SHA-1: 581a4a8e9bc0e983c683af855d040d38791c590f SHA-256: ab0204e79caf3813cffbd1d7db743a895d83a1b7e25300b7c568497f774a13b6
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm and a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches one of the identified malicious links. The primary intent appears to be directing users to malicious sites, potentially for SEO spam or to serve 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.club/wix?keyword=pixelmon+master+mod+apk
    • http://levaf.definitivearts.net/uploads/1/3/2/6/132680981/fezujijuziwaxuz-jidajepisarira-fawij-xowitamenako.pdf
    • http://files.paduastore.com/uploads/1/3/1/4/131410952/3576686.pdf
    • http://jakimesen.empoweringautismcaregivers.com/uploads/1/3/2/6/132681586/4769815.pdf
    • https://f1aa1751-c66a-4a36-92ba-50ecc9f410ce.filesusr.com/ugd/1f5cef_babbaaa055344566870968ea667f24c6.pdf?index=true
    • https://f1bfa6cc-665f-41a7-b88e-5763678e6dbd.filesusr.com/ugd/82d61e_f66a019782324972ab44efc8169ff250.pdf?index=true
    • https://47d1eadf-bbb6-4f06-9eec-dc316234fc54.filesusr.com/ugd/7f46b5_2adf450b6bd444a78308a5d76477afd4.pdf?index=true
    • https://fe74f565-6715-46d1-bb71-027474179520.filesusr.com/ugd/89441e_eccfe488863d49b59ecc1956da8c65a9.pdf?index=true
    • https://c805ad60-3c75-4b52-861d-02c3760df8ac.filesusr.com/ugd/defcb2_edcc2b6ca8474983977c976510a18374.pdf?index=true
    • https://9df92f6e-9830-4284-8574-0684f6e94217.filesusr.com/ugd/2b25b5_7a425b9dec70407a873980bab0709f04.pdf?index=true
    • https://f9eb2de7-fce1-431d-b525-7ab973324364.filesusr.com/ugd/1acd69_185fcdb2db5c4704b188da87048309b1.pdf?index=true
    • https://2f366ce5-5a6c-4eae-b33c-e9c8325bfdb9.filesusr.com/ugd/451a43_2cf0048b766a4b9f9c663fd68d00451b.pdf?index=true
    • https://4da7aba8-b866-4ecf-8852-ac1bb24269b6.filesusr.com/ugd/003b86_0c5ec0d18aee45998f3613b886918e0d.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000622b.bin
5e68f4271ffbd8c9dd521826ad4015e9a2b92f623a5726311a6c8cb68c81633e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622B 5236 bytes
font_01_sfnt_off000073e7.bin
5cb5ba2bb13e217667f56c1bc6f071139af4c8d2308fc277ceedaf759e919a4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E7 15892 bytes
font_02_sfnt_off0000a65d.bin
2971edd002e0b824ea6f6d3950fee50ed15f06f051d459e871ee757c8a57b62a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA65D 16180 bytes

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