Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e453ebd66b6be7…

MALICIOUS

PDF

107.9 KB Created: 2020-09-09 06:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9ef69ffd1646b0caf4306e0fb0407d2 SHA-1: 46c45f4ffb34685360aeb51ede399fc3d03afba5 SHA-256: b0e453ebd66b6be730539a8cd4a6f0ab588f5a924a74a9f44353e07c759f0f49
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This indicates an attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=surah+yasin+dan+tahlil+full+pdf
    • https://static.usrfiles.com/ugd/d4c4cf_97a91506d41d4547ab8acb5425b85964.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_e81b34a5f85643908300a4edc8931773.pdf
    • https://static.usrfiles.com/ugd/efc97f_7c5db4da296b41f8a6bb5205e26c8ff3.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/biology_question_bank_for_neet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7727/files/chalte_chalte_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/5478/2869/files/donasiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0559/files/58589432521.pdf
    • https://cdn.shopify.com/s/files/1/0435/5378/3957/files/stellar_data_recovery_activation_key_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6554/8708/files/28641659142.pdf
    • https://cdn.shopify.com/s/files/1/0428/9409/8598/files/9249906766.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/28068993904.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/el_libro_de_la_alquimista_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/property_damage_report_example.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00016881.bin
5136baafef9b54a87cb21ebc84b29559a98892d807474519669e1690556a3a16
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16881 33008 bytes
font_00_sfnt_off00013316.bin
3f454a3f2673a07d58b0f8a3444a41d51ab5159301f99c3f943e3d3335c35213
pdf-font-stream PDF embedded font (sfnt) at offset 0x13316 5332 bytes
font_01_sfnt_off0001453a.bin
1a0c0b36d9695feaf2d9024e1aa2807e52607c2356ab93a5f0ae8e21b51ee5ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x1453A 10504 bytes