Malicious PDF — malware analysis report

Static analysis result for SHA-256 738c909ea4202ee5…

MALICIOUS

PDF

87.6 KB Created: 2020-08-03 11:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d831d720f345bea5fdf20d0a56e38c18 SHA-1: 839cfc1dd11c88a837a43b3cbbab520317a8d2b0 SHA-256: 738c909ea4202ee5b0b141e67cdf4d340b9ee5ab3b26f45c88da0151c3a77c90
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also flagged this PDF as malicious with high confidence. The document body appears to be obfuscated or corrupted, but the presence of the malicious redirector URL suggests an attempt to lead the user to a harmful site, likely for further exploitation or phishing.

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/pify?keyword=dawkins+ancestor+s+tale+pdf
    • http://files.137point5bodycare.com/uploads/1/3/0/7/130775387/b1df9b79.pdf
    • http://files.tspedfwmidcities.org/uploads/1/3/1/0/131070481/mopurawatozovuk-jumog-gezituwaveradeg.pdf
    • http://files.joel-nichols.com/uploads/1/3/1/3/131379844/8746961.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/gomiwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1734/files/lozazalilekobudosuwumisoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/nimuxigapujigupadam.pdf
    • https://cdn.shopify.com/s/files/1/0435/4254/4533/files/71419610380.pdf
    • https://cdn.shopify.com/s/files/1/0432/9639/1323/files/10291961580.pdf
    • https://cdn.shopify.com/s/files/1/0437/2735/6056/files/13141330663.pdf
    • https://cdn.shopify.com/s/files/1/0437/0569/6407/files/nginx_block_mj12bot.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/42599368967.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/18262412507.pdf
    • https://cdn.shopify.com/s/files/1/0429/0455/1590/files/dajefaxomivavurogotaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/7598/3765/files/18177203827.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd93.bin
7fd4f5a776348643c0bca4d806b2609ea6ba80490676dff419a55c285b03c4b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD93 11244 bytes
font_01_sfnt_off0001027e.bin
5a0df67cc52ddf4b199f3e71f6c55e305c7844148cee22454ee0287b0cd0c382		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1027E 5304 bytes
font_02_sfnt_off000114b9.bin
a92ff38714da6cb050d555a90c3df4d587a4d46e7f63d7d2c3adff5702529d95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114B9 10544 bytes
font_03_sfnt_off000138cb.bin
216a38ba2db39b8cf33ce1256df46151d13d25b9d74f74e9d6c11cab778a1406		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138CB 16856 bytes

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