Malicious PDF — malware analysis report

Static analysis result for SHA-256 43bc06f7eb42c7a8…

MALICIOUS

PDF

40.1 KB Created: 2020-09-14 08:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9cba58c374ed51d6ead5f69974a0388d SHA-1: b32690d7c06357f0fe9d2b774167301b33b1fdaf SHA-256: 43bc06f7eb42c7a89ac81746c2ece59bae349868444d4274fed613f4ab5f6490
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. While no scripts were extracted, the presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

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.link/pify?keyword=lord+of+the+flies+double+entry+journal+chapter+2 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/225520_b847372b21c74eada6804ad13227850e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/227d0f_6267833e029f4ad3bfb89dd8d4bb14fb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1decf9_e1f25ce57566427388ba9826aeb59e3b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a42eed_7f69eccb20b141178235f7dda3fa504d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/99965f_45c057eaf42c4c48986aad12bbd82196.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/aef5b7_c388cbbe56e8433a889935faac93f6dc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b139f2e832534566ba572c359f306460.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1a37ec38b1a34ec982127b418537f6c9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4507/5609/files/arturia_drumbrute_impact_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/dell_latitude_e6430_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6172/9685/files/52261640854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/3323/9192/files/android_9_software_update.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c1c462_095b7af630a8471a9b975d39a9358c90.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9374a7_385d85912b3444b1869b0fa86059623e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b48b60_d4b1c26d294d4a9fa06cc5c7ad93fb51.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4733ca_bdb136fd155e4f28bab49dddea81d2f5.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D65 5632 bytes
SHA-256: 6688ee4e1e68fb60632efe0762df6b0d2a33a8ec90d403e038fdfe23fb5798d8
font_01_sfnt_off00007096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7096 10036 bytes
SHA-256: 93adc0dbd699cee83269a641c63cbfc5cc5bd6eaf68e990f32a082b739dbf828

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