Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e7f1f64eeba2a0…

MALICIOUS

PDF

48.1 KB Created: 2020-08-30 10:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10d42562d1decec84df1ece6f83335ce SHA-1: 70ab29e7da12979277e272e88368e9a53627a2fc SHA-256: 23e7f1f64eeba2a08bfd4f00303441250a88cfa821317529780c58b61391dd89
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.com/wix?keyword=kingdom+of+heaven+full+movie+in+hindi+watch+online', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site under the guise of providing movie content. The ML classifier strongly supports the malicious nature of this PDF.

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=kingdom+of+heaven+full+movie+in+hindi+watch+online
    • https://static.usrfiles.com/ugd/b8c837_40f6f4ca71f74898a515a2598ec36831.pdf
    • https://static.usrfiles.com/ugd/0f5b72_4387f8c8d9d846009c04370bb5cdfef3.pdf
    • https://static.usrfiles.com/ugd/b8c837_50d717412911452c9e850a5bb5fc6dc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_6690fb169f5d4519ae7e6e9a55f3cb58.pdf
    • https://static.usrfiles.com/ugd/49be48_cfb4e175aa684f44b0bf698a79ccb54e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab692594220b4223b171ffd1f9ddee5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_127b7f64e5fe454c97d8858f93b75350.pdf
    • https://static.usrfiles.com/ugd/271e65_93adfcdbf71d4852a11dc788b2ab013c.pdf
    • https://static.usrfiles.com/ugd/b8c837_84925f555f054e87bcf7bacf60537fb1.pdf
    • https://cdn.shopify.com/s/files/1/0435/0168/2843/files/45828476749.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/30668435658.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0964/files/case_1840_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5501/3275/files/metabolomics_applications.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/android_apps_that_give_you_money.pdf
    • https://cdn.shopify.com/s/files/1/0440/5175/9269/files/driving_school_2017_mod_apk_para_hilesi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c58.bin
7752279566814016ce10b58ca63db59413f935579fc63627315d70e4ebc3275b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C58 5284 bytes
font_01_sfnt_off00008e43.bin
3cfa3609578b09bb84a0b9172c9cb65db1dbcc4b1eea947282d0736dd8648415
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E43 10888 bytes