Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ae23764b014921…

MALICIOUS

PDF

45.8 KB Created: 2020-09-04 00:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9dbb99229fa319d21f72f310263be5a SHA-1: bf79ebb33b3529769954534fcb0d20bed47ca884 SHA-256: b6ae23764b0149217a3006e736790612a9c44896552fa3f3c9325e46c263c5e7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The embedded URL points to a redirector, which is likely part of a chain to deliver further malicious content. The document body, though heavily obfuscated, contains the target URL and references to other PDFs, suggesting a link farm or redirection strategy.

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.cc/wix?keyword=lexington+and+concord+map+worksheet
    • https://static.usrfiles.com/ugd/93971e_4bd3098279524fcaa0a9605af36115db.pdf
    • https://static.usrfiles.com/ugd/866690_30083e2e1457464589bdd744e7be7758.pdf
    • https://static.usrfiles.com/ugd/01e791_33bd8fa766254d5e96777a1ebf184ecf.pdf
    • https://static.usrfiles.com/ugd/2f07a1_9674586b23314ae7b9f0c5d9981c5a94.pdf
    • https://static.usrfiles.com/ugd/b8c837_743a26bed5e847c9bbbd96eeb19aa4b5.pdf
    • https://static.usrfiles.com/ugd/824332_6e576176642c4e28953b284b88be0283.pdf
    • https://static.usrfiles.com/ugd/78c764_9d9c50ab3d8249ada8854ad504d51527.pdf
    • https://static.usrfiles.com/ugd/b8c837_52933629e3ff42baba02a9213fd63f7c.pdf
    • https://static.usrfiles.com/ugd/8127dd_b3fe14e6fd9b488b9d771cd13df0e79c.pdf
    • https://static.usrfiles.com/ugd/cb5dea_15b0b08694d4473db1e6a8272ae737cf.pdf
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/fizikuduj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/javascript_byte_array_to_file.pdf
    • https://static.usrfiles.com/ugd/09273f_f6dde9d4cdf140a097f0b6165733ac82.pdf
    • https://static.usrfiles.com/ugd/ce77c6_7015f050c00644b4870c44c21fd039b9.pdf
    • https://static.usrfiles.com/ugd/c8a981_367645734ee540bc95c80cc3ec9adb21.pdf
    • https://static.usrfiles.com/ugd/b8c837_e39f5220c022485ba0e63cdb5461b43d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89691c8310846be9834a7ea135f739c.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_off00007458.bin
ac6e27c684cd5799cb800976220b04019c0cdc1c844dd0efd14c11005ca61471		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7458 5620 bytes
font_01_sfnt_off0000876d.bin
78151c11d7a91b183792cb9bb45294e88c6f093bd506392ff12b4b5f6a338cf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876D 10012 bytes

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