Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ccd543eb04f025a…

MALICIOUS

PDF

48.8 KB Created: 2020-08-30 15:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a983291cbd115cc054f5e8e7ed9bd80f SHA-1: 377f1e779d9aeb7dde6a7b13faf15a3010c7feba SHA-256: 9ccd543eb04f025a97d16fa63bb99efacaa8756ae7fb47106699243bed508061
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains the same suspicious URL found in the heuristics. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO poisoning. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=costumbres+y+tradiciones+de+los+yaqu
    • https://cdn.shopify.com/s/files/1/0431/3874/4469/files/cara_membuat_bookmark_dengan_adobe_reader_9.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/turoxatigeti.pdf
    • https://cdn.shopify.com/s/files/1/0434/8598/6982/files/facebook_app_for_android_tv_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/4419/2935/files/59442981050.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/96701948665.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/applied_research_technologies_inc._global_innovation_s_challenges.pdf
    • https://static.usrfiles.com/ugd/18f527_0eb989d58fb24ba190e471c75fe6d3bc.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_2dcf572b15f04649b2870402d3cdd7d5.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_a0bb3d313bd448b1aba4808f4fb76dba.pdf
    • https://static.usrfiles.com/ugd/9e53d4_253077520c1c4fbd9930ec98c84accb4.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_6e22e5a340324c40b0f882e812e08864.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/suwuwinesozibewitujalo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3831/files/oscar_wilde_poems.pdf
    • https://cdn.shopify.com/s/files/1/0463/7274/9467/files/abonnement_free_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/1575/7214/files/dialog_semiconductor_plc_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0358/files/40030714137.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_off00007ee3.bin
dd01e55e29d8964a3d50bb8758fd3ff0195cca9a8bc193e7a8ccbd7552d4a1d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE3 5356 bytes
font_01_sfnt_off00009101.bin
b05872bd2103367a09117880e8644b8eb98c3d20be40b4912c563ca68f79a839
pdf-font-stream PDF embedded font (sfnt) at offset 0x9101 10924 bytes