Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b7b8752ff45f53…

MALICIOUS

PDF

45.5 KB Created: 2020-09-01 09:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c82b74e3bc812a3948e89a32fde8ba21 SHA-1: 536f1a18344e97c9a8b8c50e6bf21f6b4cebe3e9 SHA-256: 47b7b8752ff45f53c16faf62f59aed8522da5836708ff47e545bb4529be8165a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.com/wix?keyword=bhaigiri+status++hd'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicates a phishing or malware delivery attempt. The presence of a large number of external links, as flagged by 'PDF_SEO_LINK_FARM', further supports the idea of a link farm used for traffic redirection or SEO manipulation to obscure malicious intent. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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.com/wix?keyword=bhaigiri+status++hd
    • https://cdn.shopify.com/s/files/1/0432/4265/1816/files/between_the_buried_and_me_tab_book.pdf
    • https://cdn.shopify.com/s/files/1/0459/9051/0749/files/girl_boss_book_summary.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vofekofunore.pdf
    • https://cdn.shopify.com/s/files/1/0439/9906/8310/files/lotegirukebodudebixo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1040/7069/files/14068592831.pdf
    • https://static.usrfiles.com/ugd/b8c837_39b5926b6d2743f98b7495f268de3080.pdf
    • https://static.usrfiles.com/ugd/d99ef3_20fdf1de72834392be36396cb8dd85bc.pdf
    • https://static.usrfiles.com/ugd/89064d_7a87151bf49f45beaa7b0584a67d95ac.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_e45da7921a09478f833a40b289aea569.pdf
    • https://static.usrfiles.com/ugd/f65518_9f727c7aa62940999624cb454a3031aa.pdf
    • https://static.usrfiles.com/ugd/95089d_33c1fe8b448641a4bbaf0de39188c15b.pdf
    • https://static.usrfiles.com/ugd/6cfc61_29f607e3b30448c2baac72a2e4ec94a6.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004db6.bin
5bab6b2b6f7b30ce7fa1af8fd0fef0d4755da2bb2bc0e105e35ed298b4967f66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB6 5104 bytes
font_01_sfnt_off00005f03.bin
e49a821da9bbad78031c9b2f0745bfaeaeefbdb486bb75f6625ea8fdca326718		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F03 2748 bytes
font_02_sfnt_off00006b01.bin
d05c8b52be9c10ae22e83396212beb548e061113e9aa91c4b04f276aebbd2c97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B01 10288 bytes
font_03_sfnt_off00008e9d.bin
ad0006ca2064d62334e0e175b9753b3fd9992c45e154ebc68d30541b946dfd58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9D 7256 bytes

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