Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea42c12486da220d…

MALICIOUS

PDF

44.8 KB Created: 2020-08-06 20:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5401660624b76ae0713224642e72412f SHA-1: 31fda760eb2f984999dc9833d401432889201b79 SHA-256: ea42c12486da220d0cfea36efd9acf2d52c8352fc4c5553706c3eeb4b77f7157
160 Risk Score

Malware Insights

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

The PDF contains a lure for a 'pdf converter to word freeware full version' and embeds numerous links, including one to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=pdf+converter+to+word+freeware+full+version, which is a critical finding. The presence of a link farm and the remote-support lure suggest an attempt to trick users into downloading or interacting with malicious content. No scripts were extracted from this sample.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=pdf+converter+to+word+freeware+full+version
    • http://xuberudid.hanshi.com/uploads/1/3/1/1/131164250/jisuju_bemidanarene_fujebaxo_vosizenasaxuw.pdf
    • http://files.maddiebro.com/uploads/1/3/1/1/131164424/1649234.pdf
    • http://files.shadowwind.org/uploads/1/3/2/7/132711999/8047880.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/tixujakozutewesasoxujiwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4243/0362/files/basic_structure_of_sql_queries.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1945/files/88551113544.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/xupalaxaxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/charlottes_web_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/9584192034.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/inductive_and_deductive_method_of_research.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/38996426396.pdf
    • https://cdn.shopify.com/s/files/1/0434/0813/0213/files/furuguwumaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/1524/1891/files/wavugamugefino.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/tet_answer_key_2020_paper_1_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4758/1856/files/sobobolotowijunukuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3029/9292/files/40173168105.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/90314152856.pdf
    • https://cdn.shopify.com/s/files/1/0430/3545/9738/files/rijipiwipademawenerapufar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006500.bin
e271e6ad3767a5570c3747bce1134fb24855bf7be3541d899a21559fd3deadb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6500 5052 bytes
font_01_sfnt_off00007644.bin
362866ceca8f01d7b605617f2e826be031822ba3824456e3789b8c832e1d86de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7644 9812 bytes
font_02_sfnt_off000097c8.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97C8 4324 bytes

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