Malicious PDF — malware analysis report

Static analysis result for SHA-256 1844b49308fecd24…

MALICIOUS

PDF

75.7 KB Created: 2020-10-29 05:32:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45fb2c2fe1f4a568fb011b92ae833623 SHA-1: 9d269096e60179f20b45c6adeaa936fffbd89828 SHA-256: 1844b49308fecd24d8af9518abd96b7f81de63497e2e78cfef2116558c57e101
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to suspicious domains and are flagged as part of a link farm. One of the primary links, 'https://cctraff.ru/123?keyword=malayalam+movies+2019+olangal', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://cctraff.ru/123?keyword=malayalam+movies+2019+olangal
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/risujinenabus-zudomosimoko-nesexob.pdf
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/wesitelabupi-tejamogijunu-lakokimebu-jinemupokuxe.pdf
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f8b1419d1558.pdf
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/e4253afb217.pdf
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f8e5bf2ceafe.pdf
    • https://joleziravakejar.weebly.com/uploads/1/3/4/4/134460301/fazogotodelunete.pdf
    • https://cdn-cms.f-static.net/uploads/4377717/normal_5f9a05d9c86bf.pdf
    • https://cdn-cms.f-static.net/uploads/4372382/normal_5f8abdd286b77.pdf
    • https://cdn-cms.f-static.net/uploads/4402520/normal_5f9266fd2ed75.pdf
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/bc4a3c26.pdf
    • https://tuxonojetivap.weebly.com/uploads/1/3/4/4/134437157/2462838.pdf
    • https://cdn-cms.f-static.net/uploads/4370299/normal_5f8c6699a0be3.pdf
    • https://kagadema.weebly.com/uploads/1/3/4/4/134456650/80452.pdf
    • https://cdn-cms.f-static.net/uploads/4404730/normal_5f94f35d4a3ac.pdf
    • https://cdn-cms.f-static.net/uploads/4380545/normal_5f9088cade28a.pdf
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f97e46915c71.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • https://uploads.strikinglycdn.com/files/81968455-27e6-404e-8816-942f80bf3b4d/apostila_de_eletrica_industrial_senai.pdf
    • https://uploads.strikinglycdn.com/files/28ab5d00-e92c-4d79-962a-e2e9aaacc624/drivers_ed_book_texas.pdf
    • https://uploads.strikinglycdn.com/files/608a9807-8028-49b4-8eda-6c35b979a8d0/76414997524.pdf
    • https://uploads.strikinglycdn.com/files/411e44b3-9c8b-40d6-bc02-a1752950226b/nitoxil.pdf
    • https://uploads.strikinglycdn.com/files/021b68a7-8e8f-4df0-aa7b-777131548cc5/76452260192.pdf
    • https://uploads.strikinglycdn.com/files/b7feceb2-33e7-4b8b-ba36-e67d1fabc0ee/4427820775.pdf
    • https://uploads.strikinglycdn.com/files/0ba10955-485b-45c4-afde-4625507b3f6b/malapexases.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/
    • http://scripts.sil.org/OFL
    • https://gitlab.com/smc/meera/blob/master/COPYING

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d210.bin
2f8a191fc35d28252065e7e66860bb172c6c68033f8cdb75c6c043e54b07ae57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD210 5556 bytes
font_01_sfnt_off0000e500.bin
a742ece00106d45190ca92b5ef076c7a54266a80ad8db79e1c9592e1a9dccd66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE500 5676 bytes
font_02_sfnt_off0000f9c6.bin
9790016ba50a96c205e8c42975bc10350f6d943d9e15c7c81ba6f6d70df0336a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C6 11148 bytes

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