Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a02952ff8cc331…

MALICIOUS

PDF

39.7 KB Created: 2020-09-18 01:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2255ca37738b86332462edfa87f12d26 SHA-1: b3e5a9762a686218c63146cbdbfe6851aa856093 SHA-256: e2a02952ff8cc3311179d71b0cf79760430baf4def190b9f5ba22044306231c7
154 Risk Score

Malware Insights

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

The PDF document contains a high number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious URL identified is https://ttraff.me/wix?keyword=tecno+12-18+respostes, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a lure to external 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.me/wix?keyword=tecno+12-18+respostes
    • http://files.calblazebaseball.com/uploads/1/3/1/8/131856065/3662f939886bb.pdf
    • http://files.christophernewhook.studio/uploads/1/3/0/7/130776407/442151.pdf
    • http://files.carolannliaros.com/uploads/1/3/2/8/132814996/zatekedire.pdf
    • http://files.abstracted.com.au/uploads/1/3/0/9/130969476/genisagadegafuxar.pdf
    • http://fogirizax.mitchadvent.com/uploads/1/3/1/6/131637046/tajujisokifa_gojedomobeke.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/format_of_job_letter_writing.pdf
    • https://cdn.shopify.com/s/files/1/0433/3433/6670/files/pastorale_secret_garden_violin_sheet_music.pdf
    • https://c0c239cb-de60-4cc3-9097-9ee90a8574ad.filesusr.com/ugd/a31856_5eb0ab0bb65d4940a5b7463c3d69a90b.pdf?index=true
    • https://7d507cd1-b7a9-4592-9269-bc1bba838411.filesusr.com/ugd/98e2de_e176877fc6104457973d586b6a71b583.pdf?index=true
    • 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_off00005e76.bin
37bbf0c53c12beb8a829896b2a9393696b91df52503622f5f50d6d4a86f5c149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E76 5044 bytes
font_01_sfnt_off00006fc8.bin
8b5181cc643fb213e7bffffc77537a49f16185dbb0bed9f9d6483c11e07ae45f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC8 10168 bytes

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