Malicious PDF — malware analysis report

Static analysis result for SHA-256 661d22bd9b7d2bf2…

MALICIOUS

PDF

66.8 KB Created: 2020-08-29 05:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75a5b9fff324f11cb700a72246f75ccf SHA-1: 57fe4a9cb95f533443a1ec6183320cbf8dc5678d SHA-256: 661d22bd9b7d2bf2377cea9eb63c6785fc6480b10200afd6f2d70f35047b34f7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content.

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=48+laws+of+power+pdf+list
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_1353e6e07bad48c5b2d358914f14a1f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_c537351e4a354ccab79ff39354c79878.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3e060cd61624e13923302f728930d53.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1eb81697ff347718ec98a3c8ebf3ed8.pdf
    • https://static.usrfiles.com/ugd/b8c837_31dbd8fa2f504700938b1a38cfc66fb1.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/bopagus.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/kurunibe.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/skb_ps_25_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0389/files/20084189761.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/48431707402.pdf
    • https://static.usrfiles.com/ugd/b8c837_502f1399816e44929536504239af61e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fde20de732f4948909f569345c69715.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d00b330d89e41bbb84a22664eb146c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_6573bfaeffc24253bee62bc962877ac2.pdf
    • https://static.usrfiles.com/ugd/b8c837_82ba3f0352f94de98ec1d584422ec232.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7c2.bin
f6c89fcb10cbfba550034eea556be235fffd5f775c44207f77bc8f5131d83116
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C2 5312 bytes
font_01_sfnt_off0000d9f3.bin
8d7ce360af03091fa04b0a1aebda8e148ad00b24356a2d20969ba5cdbfca4b16
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F3 10504 bytes