Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e405e6e3b55263…

MALICIOUS

PDF

35.6 KB Created: 2020-09-03 13:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6b5351c62eaba301ac8f07ffae3b9cc SHA-1: 977b27b6c94e3fdfcdd189112fb3ff4d3fabeaf9 SHA-256: 11e405e6e3b552634b4b52ed57f34481b84f8b5daba16ca2d771645eb81bacaf
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.me/pify?keyword=light+em+up+piano+sheet+music, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. No scripts were extracted, but the presence of the malicious redirector and link farm indicates a phishing or scam attempt.

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.me/pify?keyword=light+em+up+piano+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/4977/1427/files/42755345571.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/begemibugobar.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/rupagitizun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumuwajufutoz.pdf
    • https://static.usrfiles.com/ugd/3e9e83_2649fc8ddde64b1ab87bed62712ee797.pdf
    • https://static.usrfiles.com/ugd/ac72e0_2b94bf2959914c95bdbd1107e1972316.pdf
    • https://static.usrfiles.com/ugd/64e449_8842a0c04cf14aa698e89fbc8ad32b17.pdf
    • https://static.usrfiles.com/ugd/ba3095_2ddb5b6f294b4e3f9435a93a535d9076.pdf
    • https://static.usrfiles.com/ugd/fd7405_04ebb33370c643e0a8bf84feed82c7ca.pdf
    • https://static.usrfiles.com/ugd/e42c35_8010c8de6c63498ca50d9caf2b9253f9.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004153.bin
7ddc8c9bef226e9db0ce12a6ec560fc39a4ce3c2e34dbd62a81a142b6210873b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4153 5044 bytes
font_01_sfnt_off00005261.bin
f7f3736b91ea6e5e42861f019fa12a0dce522dab370b80919d672a5dffe0af8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5261 9760 bytes
font_02_sfnt_off000073ed.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x73ED 4324 bytes