Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6ccf192d08f835…

MALICIOUS

PDF

47.4 KB Created: 2020-08-19 09:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f5f8cd667d03226552060e457431af1 SHA-1: ecf21dce191bcae6e8fc9fb67c2347380463e64f SHA-256: 7c6ccf192d08f8354aa9fca8efa4d194be7d56457a046625b4408c10d52af59c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to potentially malicious redirectors, and is flagged by ML classifiers as malicious. The document body, though heavily obfuscated, contains a URL that is also listed as a known malicious redirector. The presence of numerous external links suggests a link farm or redirection tactic to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.ru/pify?keyword=interview+questions+and+answers+in+english+images
    • http://zelon.missanoble.com/uploads/1/3/1/4/131406686/7a3a97350c50ef.pdf
    • http://files.quintetbenefice.com/uploads/1/3/1/4/131409090/edb2bef6c57.pdf
    • http://files.sensenet-project.org/uploads/1/3/1/4/131452750/maxugipigulogu-gesizikozu-powulof-xujomuj.pdf
    • http://files.shearserenitysalon.com/uploads/1/3/1/3/131383553/53b9878d6b0f11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3613/7882/files/complex_sentence_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/tirumukumapunovizidajuxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/vastu_shastra_books_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/fundamentals_of_python_first_programs_lambert.pdf
    • https://cdn.shopify.com/s/files/1/0434/3988/2402/files/between_the_sheets_manga_chapter_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/zusiwoxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4317/7126/files/jujidaw.pdf
    • https://cdn.shopify.com/s/files/1/0444/2826/3591/files/24134494332.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/upper_limb_bd_chaurasia.pdf
    • https://cdn.shopify.com/s/files/1/0433/9993/8211/files/routing_algorithms_in_computer_networks_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0441/2253/8136/files/junijokiduravebuza.pdf
    • https://cdn.shopify.com/s/files/1/0432/8230/1094/files/goldman_s_cecil_medicine_twenty_fourth_edition.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ce7.bin
2e2c447baf56f090101e0384cea2c30c09fc19cc7c3f037efc944c5720a337db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE7 5452 bytes
font_01_sfnt_off00008f51.bin
b64722d1a772bf782a8073d15c4c665f568005b8872e28c7722d9000cc6b6f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F51 9536 bytes

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