Malicious PDF — malware analysis report

Static analysis result for SHA-256 0185b904a8ce84fc…

MALICIOUS

PDF

48.0 KB Created: 2020-09-05 02:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71c7c7682550fa6b78e1be3b5150e573 SHA-1: f04d64c1717a2456dd280f6be631486f6ecd0932 SHA-256: 0185b904a8ce84fc639127e49b5bddaae07a3aaa809611fe416cf9fa8f560d2f
174 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, including one pointing to a known malicious redirector at `https://ttraff.club/wix?keyword=cancer+information+center`. The document body, though partially obfuscated, also contains this URL, suggesting a lure to a malicious site. The presence of numerous links to Shopify domains, some of which are benign, indicates a link farm strategy to improve SEO for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.club/wix?keyword=cancer+information+center
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25696514874.pdf
    • https://cdn.shopify.com/s/files/1/0436/9966/7112/files/bukhari_shareef_ki_sharah.pdf
    • https://cdn.shopify.com/s/files/1/0437/2666/7925/files/dudenitovujufaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/bts_world_correct_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1137/files/uv_visible_absorption_spectroscopy.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/94162534076.pdf
    • https://static.usrfiles.com/ugd/05900a_fcc4ac0d99114e0a89ea1ce15f816e5c.pdf
    • https://static.usrfiles.com/ugd/f63f29_bfad8dcc86e74ef7957914dd0ac3dfef.pdf
    • https://static.usrfiles.com/ugd/120874_4379b77a6e2441518bef5cba91488511.pdf
    • https://static.usrfiles.com/ugd/229b11_4024c9437c0f41c29d83c967dddceb1c.pdf
    • https://static.usrfiles.com/ugd/cac9e4_ce0cac5c03934af3b15abd57b7f2b111.pdf
    • https://static.usrfiles.com/ugd/b8c837_1314c5e26b3f4a2b8d6559bc7f3751e8.pdf
    • https://static.usrfiles.com/ugd/361f4b_0e22379b55a641e4a179ab63935a93f4.pdf
    • https://static.usrfiles.com/ugd/359e64_88c73f645a5b4e75a227f396351de136.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_off00008114.bin
b724a70509e63f1cb4fcdcbb14361e811c1280f937c4d66db5aab010aa215f84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8114 4724 bytes
font_01_sfnt_off0000910c.bin
25f524f13a5b233c30d4a82f925378f529c81f7ce8439d925511343037061034		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910C 10132 bytes

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